You have a grade 1 Auto 5 made in 1938. It has the front trigger safety. auto5man
50 USD
Try gunbroker.com in the barrel section.
The barrel will be marked "Made in Belgium"
It will be marked on the receiver/barrel.
Which model is this? Simply check the barrel. It should say Made in Belgium if it was.
it would be stamped on the right side of the barrel.
Usually located on the frame/reciever and/or barrel.
Please re ask. What is your question?
OEM from Browning. Anything else will require a gunsmith.
Belgian proofmarks, year of manufacture, barrel inscription. == ==
@ 40" or so depending on LOP and Barrel length.
take it to a gunsmith