picked this up the other day, quite pleased with it. I'm trying to figure out when it was made, as the tag has worn away. I think it's a Specification PQD 370-B (July 9 1943) ? Here's some info that I found on another forum, hope it's ok to post here:
3. Specification PQD 370-B (July 9 1943)
-The bottom of the sleeves are more simplified.
-The patch for closing the collar is replaced by a trapezoid patch sewn behind the left side of the collar and held in place by buttons.
-The second button for the collar is no longer there.
-The size is now printed below the collar.
-Makers tag is in the right lower pocket.
4. Specification PQD 397 (September 15 1943)
-Looks like the M-1943-A
Its made of poplin, and lined by flannel to use up the existing stocks for the Field Jacket lining (M-1941) Its made in small amounts until spring 1944.
5. Specification PQD 370-C ((October 11 1943)
-Suppression of the 2nd button of the patch for the upstanding collar when its not being used.
-The loop for suspending the jacket is now actually sewn in a loop. This was not so before.
-18 sizes available, three lengths, Short, Regular and Long.
Thanks for the help!