Savage Springfield model 947 12 gauge

[2321kci]

I can't seem to find any legit info on this shot gun. It has no serial but I would like to age and price her for insurance purposes. There are no factory serial numbers i can find on gun itself only Springfield model 947, Savage arms and caliber markings it is a single shot 12 guage. Would love to find out more on it if anyone knows years these were in production or any current pricing. Thanks in advance for your help all.

[Mad Dog]

See if you can find a date code on it somewhere.

It's a small oval with a number and a letter stamped inside of it.