Dupondio/Sesterzio¹, zecca itinerante al seguito di Ottaviano, 38 a. C. o successivo, Cr. 535/1, Syd 1335, indice di rarità secondo Sydenham "(3)".

D. Testa nuda di Ottaviano a destra barbato; dinanzi  CAESAR in senso orario a scendere, dietro DIVI F in senso antiorario a scendere².
R. Testa coronata di Cesare a destra; dinanzi DIVOS³ in senso orario a scendere, dietro IVLIVS in senso antiorario a scendere⁴ . 

La ricerca nel web ha prodotto i seguenti risultati:

1. http://www.wildwinds.com/coins/ric/augustus/RPC_0620.1.jpg Lot Number: 64310 Estimate: $200.00 Final Sale Price: $357.50 Denomination: Dupondius Grade: Fine red-brown patina Reference: Crawford 535/1; CRI 308; Sydenham 1335; RPC 620 Octavian & Divus Julius Caesar. After 38 BC. Æ Dupondius (11.97 gm). Uncertain Italian mint. CAESAR DIVI F, bare head of Octavian right / DIVOS IVLIVS, wreathed head of Caesar right. Crawford 535/1; CRI 308; Sydenham 1335; RPC 620. Fine, red-brown patina, light porosity. Estimate $200. Online auction number 38 closed September 24, 2001.
2. http://www.wildwinds.com/coins/ric/augustus/RPC_0620-o.jpg

http://www.wildwinds.com/coins/ric/augustus/RPC_0620-r.jpg ORC8433 Julius Caesar portrait dup. G, NR Octavian & Divos Julius Caesar, Æ dupondius, (12.72g) c. 38 BC, Italian Mint, DIV[I F CAESAR] Bare head of Octavian right. / [DIVOS IVLIVS] Head of Julius Caesar right. Vagi 71; RPC 620; C 535/1. G, dark brown patina. US $25.49 bidder - now Ends Mar-03-03
3. http://www.coinarchives.com/a/lotviewer.php?LotID=46567&AucID=50&Lot=1956 Gorny & Mosch Giessener Münzhandlung > Auction 122 Auction date: March 10th, 2003 Lot number: 1956 Price realized: 340 EUR (approx. 376 U.S. Dollars as of the auction date) Lot description: RÖMISCHE REPUBLIK RÖMISCHE REPUBLIK NACH 211 v.Chr. Objekt-Nr.: 1956 Octavian, 38 v. Chr. AE Bronze, (13,38 g.), Mzst. in Italien. Vs.: CAESAR DIVI F, bärtiger Kopf des Oktavian n.r. Rs.: DIVOS IVLIVS, bekränzter Kopf Cäsars nach r. Cr. 535/1 Schöne grüne Patina, ss Estimation: € 300,00 Hammer price: € 340,00
4. http://www.wildwinds.com/coins/sear5/s1569.html Description 69, Lot: 78. OCTAVIAN, with DIVUS JULIUS CAESAR. After 38 BC. Æ Dupondius (29mm, 16.10 gm). Southern Italian mint(?). Estimate $500. Sold For $610 OCTAVIAN, with DIVUS JULIUS CAESAR. After 38 BC. Æ Dupondius (29mm, 16.10 gm). Southern Italian mint(?). Bare head of Octavian right, wearing slight beard / Wreathed head of Caesar right. Crawford 535/1; RPC I 620; CRI 308; Sydenham 1335. VF, black-green patina, minor pitting
5. http://www.wildwinds.com/coins/imp/octavian/cohen_0003.1.jpg Date: B.C. 038 Reference: Sear 465, RSC - Obverse: DIVI F CAESAR, Bare head of Octavian r. Reverse: DIVOS IVLIVS, Laureate head of Julius Caesar right Mintmark: none Condition: F, corroded. Currently $177.50 Ends 10/05/99
6. http://www.wildwinds.com/coins/imp/octavian/cohen_0003.2.jpg Date: B.C. 038 Reference: Sear 465, RSC - Obverse: DIVI F CAESAR, Bare head of Octavian r. Reverse: DIVOS IVLIVS, Laureate head of Julius Caesar right Mintmark: none Condition: VG Currently $18.50 Ends 10/05/99
7. http://www.wildwinds.com/coins/imp/octavian/cohen_0003.3.jpg Description This coin was minted circa 38 BC under the authority of Octavian, who was the declared heir of Julius Caesar, and who campaigned against Mark Antony following Caesar's death to determine the fate of the Roman world. Antony's defeat at Actium in 31 BC left Octavian as master of the entire Roman world. He would be given the title Augustus by the Senate in 27 BC, and this is the title he was known by from that point onward. It has been said of Augustus that he 'found Rome made of brick, and left it made of marble'. This piece was minted in honor of Julius Caesar, his political benefactor. Caesar was born in 100 BC, and was, of course, assassinated on the Ides of March, 44 BC. He began his political career as a young man, opposing the dictatorship of Sulla. He became a prominent figure in the Roman aristocracy, and was elected consul in 59 BC, after having formed the first triumvirate with Pompey and Crassus. He campaigned in Gaul almost continuously between 58 and 50 BC, and he would also lead an expedition to Britain in 55-54 BC. He defeated Pompey at Pharsalus in 48 BC, and would spend the next two years defeating the remnants of the Pompeian party. He returned to Rome the undisputed master of the Roman world, but would hold supreme power for only a brief period before his assassination. The obverse of this type depicts the bare head of Octavian facing right, with legend CAESAR before, and DIVI.F. behind. The reverse type features the laureate head of Julius Caesar facing right, with legends DIVOS before, and IVLIVS behind. This piece shows heavy wear and a lightly granular tan patina, and grades G, with major devices clearly visible, and the DIVI.F. of the obverse legend readable. Still a decent and very affordable example of this rare and highly sought after type, the only imperial sestertius available with a portrait of Julius Caesar. It is catalouged as Sear-465. Currently $99.00 Ends Apr-05-00
8. http://www.wildwinds.com/coins/imp/octavian/cohen_0003.4-o.jpg

http://www.wildwinds.com/coins/imp/octavian/cohen_0003.4-r.jpg OCTAVIAN & JULIUS CAESAR . c. 38 BC-. Bronze Sestertius (?), 27mm (14.52 gm). O: Head of Octavian, r.. R: Head of Julius Caesar, r.. cf. Craw 535/1.. Scarce, historical and VF. Currently $405. Ends Aug-03-01. Octavian & Divus Julius Caesar Æ Dupondius. Italian mint, 38 BC. DIVI F CAESAR, bare head of Octavian right / DIVOS IVLIVS, wreathed head of Julius Caesar right. Cr535/1, Syd 1335, RPC 620.
9. http://www.wildwinds.com/coins/imp/octavian/cohen_0003.5-o.jpg

http://www.wildwinds.com/coins/imp/octavian/cohen_0003.5-r.jpg Octavian & Divos Julius Caesar, Æ dupondius, (18.35g) c. 38 BC, Italian Mint, DIVI [F] CAESAR Bare head of Octavian right. / DIVOS [IVLIVS] Head of Julius Caesar right. RPC 620; C 535/1. VF, green patina. While this coin used to be called a sestertius, it probably circulated as a dupondius. Currently $325.00 Apr-16-01
10. http://www.wildwinds.com/coins/imp/octavian/cohen_0003.6.jpg 1071. OCTAVIAN & DIVUS JULIUS CAESAR. After 38 BC. Æ Dupondius (24.02 gm). Bare head of Octavian right / Wreathed head of Caesar right. Crawford 535/1; Sear CRI 308; Sydenham 1335; RPC I 620. VF, dark green patina, some smoothing and minor marks. ($500) CNG Mail bid sale #58, 18 Sept 2001, lot 1071. Octavian & Divus Julius Caesar Æ Dupondius. Italian mint, 38 BC. DIVI F CAESAR, bare head of Octavian right / DIVOS IVLIVS, wreathed head of Julius Caesar right. Cr535/1, Syd 1335, RPC 620.
11. http://data.numismatics.org/cgi-bin/showobj?accnum=1944.100.6017 Department R Object Type C Material AE Manufacture ST Weight 26.96 Axis 11 Denomination Bronze Start Date -38 End Date 0 Reference C.535.1|S.1335 Person Octavian|CAESAR DIVI.F Dynasty Republic Mint Italy Issuer Octavian|CAESAR DIVI.F Series Crawford Obverse Legend CAESAR DIVI.F Obverse Type Octavian head r., bearded Reverse Legend DIVOS IVLIVS Reverse Type Caesar head r., wreathed
12. http://www.maltergalleries.com/archives/auction02/09292002/lot0336.jpg 336. Octavian & Divus Julius Caesar. After 38 BC. AE-Sestertius. 29.18g. CAESAR DIVI F, bare head of Octavian rt. / DIVOS IVLIVS, wreathed head of Caesar rt. Craw 535/1; Syd. 1335. Fine, flan flaw. View Item   $200
13. http://www.vcoins.com/ancient/realms/store/viewItem.asp?idProduct=277&large=0 Octavian. 38 BC. AE - Sestertius. nr VF Octavian. 38 BC. 29 mm. AE - Sestertius (26.1 gms) CAESAR DIVI F, (or Dupondius?) Bare head of Octavian right. Bare head of Octavian right. / DIVOS IVLIVS, Laureate head of Divos Julius Caesar right. References: Crawford 535/1; Syd 1335; BMCRR Gaul 106; CRI 308 ($1200). nr VF. Inexpensive portrait of Julius Caesar! Southern Italian Mint. Unlike Antony's 'Fleet Coinage', these bronzes bear no indication as to their denomination. The community is mixed on the issue, some believe Sestertius, others Dupondius. With the normal issue being about 19-20 grams, I call this one a Sestertius. Price $ 510 € 390.57 £ 267.44 CHF 602.52 CAD$ 633.73 Rates for 4/21/2005
14. http://www.vcoins.com/ancient/realms/store/viewItem.asp?idProduct=281&large=0 Octavian. 38 BC. AE - dupondius. nr VF Octavian. 38 BC. 29 mm. AE - dupondius (11.4 gms) CAESAR DIVI F, (or Sestertius?) Bare head of Octavian right. Bare head of Octavian right. / DIVOS IVLIVS, Laureate head of Divos Julius Caesar right. References: Crawford 535/1; Syd 1335; BMCRR Gaul 106; CRI 308 ($1200). nr VF, Nice for this typically crude issue. Inexpensive portrait of Julius Caesar! Southern Italian Mint. Unlike Antony's 'Fleet Coinage', these bronzes bear no indication as to their denomination. The community is mixed on the issue, some believe Sestertius, others Dupondius. With the normal issue being about 19-20 grams, I call this one a Dupondius. Price $ 495 € 379.08 £ 259.57 CHF 584.80 CAD$ 615.09
15. http://www.vcoins.com/ancient/vaughncoins/store/viewItem.asp?idProduct=52&large=0 Julius Caesar and Octavian . 38 BC . AE Sestertius . Julius Caesar and Octavian . 38 BC . Bronze Sestertius . 31 mm . 18.0 gm. THE ONLY SESTERTIUS ISSUED WITH JULIUS CAESAR'S PORTRAIT Obv : CAESAR DIVI F ; Bare Head of Octavian, rt. Rev : DIVOS IVLIVS ; Wreathed Head of Julius Caesar , rt. Reference : Sear 1569 (RCV 2000) KHDDCJA Price $ 575 € 440.34 £ 301.52 CHF 679.32 CAD$ 714.50 Rates for 4/21/2005
16. http://www.rudnik.com/rudnik/rudnik/rome/twelve1/htmls/R2578.html TYPE Roman Imperatorial, Octavian (42 - 27 BC), bronze sestertius (dupondius?), struck 38 BC honoring Julius Caesar, 19.93g DESCRIPTION . Obv: Bare head of Octavian to right, legend: CAESAR DIVI F Rev: Laureate head of deified Julius Caesar, legend: DIVOS IVLIVS REFERENCE: SR 465, Syd 1335, Cr 535/1 GRADING: VG / VG+, brown-red patina w/ some green tones, couple of pits, scarce ORDER INFO: R2578, $125 A budget specimen of this prized issue, featuring the first and foremost two of the Twelve Caesars. Still, nice patina complements the typically (for this issue) low-relief, yet discernible finely styled portraits; this is all the more valuable, since portraiture of this era is usually in the "patrician" school and thus generally not aesthetically very pleasing, and later Augustan depictions are mostly of an idealized "Neo-Attic" style. While the present renditions do display some of this idealization (and understandably so, given the deification of the father - and appropriate hints for the adopted son - that they here advertise), there is nevertheless a note of an expressive realism, and - at least in the case of the merely 25-yeear old Octavian - a rather atypical for him sense of an authentic, lifelike depiction. 

Un saluto cordiale.
Giulio De Florio
www.monetaromana.it
 

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Note:

(1) Estraggo dal data base dell'ANS (http://www.amnumsoc.org/search/) le caratteristiche fisiche della moneta di figura: