If you do a web search on "Belgian proof marks", one or two sites will have examples you can look at.
I am looking for a firing pin for a Crescent Firearm I believe the serial # is 8894
www.gunproofmarks.ru
sorry- no public serial number records.
It is a shotgun not a rifle- and Crescent was bought by Savage in 1931.
50-125 USD
No records.
I would assume what you are looking at are Belgian proof marks. Which, of course, tell the country of origin and not the manufacture. The P.V by the way implies that the firearm has been nitro proofed.
It is a Belgian proof mark
The shotgun you described is a Belgian-made 12-gauge firearm produced by Théâtre Frères in Liège, known for its quality craftsmanship. The ELG mark indicates it was proofed in Belgium, while the TAT mark may refer to the specific inspector or proof house. The choke designation "choke182" suggests the type of choke configuration, and "PV1270" likely pertains to the pressure rating or proof specifications. Its serial number 3501 can help identify its production year and lineage.
404019
Need serial number to date most any firearm. Check Browning's website under customer service, then date your firearm. Value is determined by condition of firearm, and area of the sale.