[B]Louis

I recovered this from the internet archive with just a few minutes effort - not everything is there but all is not lost[

Mark /B]

Re: difference between SA and WRA gas cyl?
Posted By: Joe the Butcher
Date: Friday, 18 February 2000, at 6:43 a.m.

Might I add; the barrel ring is much thicker than SA. The rounded top barrel ring profile will have what appears to be hand-grinding tool marks running sideways at the very top. There is a 1/16 step just under the sight platform on both sides of the WRA cylinder. Original finish on WRA is bluing over iron plating. WRAs also have heavy machine marks on base platform and at utmost rear of the cylinder. The stack swivel screw is staked with a rounded tool that leaves a domed appearance. No other manufacturer staked them this way.

Some knock offs and foreign cylinders also have this round rear ring profile but they are wide base configuration and do not exhibit the grinding or thick features discribed above.

If you have a narrow base cylinder in front of you, chances are that it's a SA. WRAs are scarce.

Hope this helps. JTB