That is a IBM in WWII issue format: high wood M1 stock, "L" sight, thin barrel band w/o bayo lug, button safety, two-nib mag catch.
My IBM re-import from South Korea was "upgraded" with M2 stock, adjustable sight, barrelband w. bayo lug, flip wing safety, three-nib mag catch.
The WWII era guns are a better value on the collectible market. Color me envious.