Barrel date.

[latigo 1]

To add to RCS's info: My list shows barrel 16-R-90-A on 9-42 barrel, 16-R-97-A on a 11-42 barrel, 16-R-109-B on a 1-43 barrel. Your 16-R-103 barrel appears to be a Jan.'43 barrel.

[Bruce McAskill]

That seems to indicate that the barrel is original to the receiver? Both made in January 1943. And here I thought it was a replacement barrel, go figure. Thank you all for the information and the help.