Last year about this time, M41 .38 Special was fairly common at surplus ammo dealers and at gun shows, at least here in AZ. I bought a number of boxes of it, and it's all headstamped "WCC 91". The white box is marked
"50 Cartridges
Ball
Caliber .38 M41"
a lot number and "Olin Corporation"
By eyeball, it's a 130-grain FMJ bullet and it seems to have plenty of pep, especially compared to the wadcutter reloads I usually shoot for fun.
So the M41 was still going in '91..