The ORIGINAL Diving
Catalog (June 1953)

Ever wonder just why a reserve valve is called a "J-Valve" 
and, why a non-reserve valve is called a "K-Valve"? .... 
Well wonder no more...
Page 6 lists the reserve valve shown on page 7 as "item J",
and the ordinary valve as "item-K"
..Yup, its as simple as that..
It all echos back to the FIRST catalog..
Have a look at the first of the "SCUBA" Catalogs,
and read part of the introduction below, from Page 2 (it's a hoot)...
 
Now thanks to this self contained diving unit, any healthy swimmer  can dive among the wonders of the deep without training, below 100 feet and up to one hour unhampered by hoses or lines..(Page 2 Introduction)

Cover & Back Page Page 2 & 3   Page 4 & 5  Page 6 & 7
Page 8 & 9  Page 10 & 11   Page 12 & 13 Page 14 & 15

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Page 10
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