I believe the lettre annale on the R barrel is a lower case 'q', which would be a 1938 date of proof.
The gun has 2 3/4" chambers and is smokeless powder proved, which was obligatory after 1924.

Cornell Pubs has a 1938 A&F catalog which might show the gun
https://www.cornellpubs.com/old-guns/item_desc.php?item_id=880