#1331
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The 63+ tells me its date of manufacturer is 1963. The numbers before that will tell you the month, working pressure. It would look like this "ICC 3AA 2250 ?? 63+" The ?? is the month. Those numbers are on that tank, maybe under the coating. The + allows a 10% over fill. The + rating may not be any good if it hasn’t been done at each hydro.
The tank may be good, but not really practical for you to use. The volume is to small.
Check out my twins 42’s http://divebuddy.com/photo.aspx?PicID=59522&MemID=2165
Maybe this will help.
The Volt valve is a 1963 Pro series 1/2 NPT "K" valve. I hve the parts break drawing and part numbers for that valve
The 72’s are about 25 inches long.
42 cf 6.75 X 18.75 working pressure 1880
50 cf 6.82 X 18.75 working pressure 2250
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