A shotgun (also known as a scattergun and peppergun,[1] or historically as a fowling piece) is a firearm that is usually designed to be fired from the shoulder, which uses the energy of a fixed shell to fire a number of small spherical pellets called shot, or a solid projectile called a slug.
They are most likely a manufacturers mark or perhaps a product serial number or sorts.
0.5625 G mm'
A trade mark, manufacturer's mark or factory mark.
Antique expert Mark D. Stacey has the sexual orientation of heterosexual. He is not married, but he does date the opposite sex.
Proof mark.
There are many signs that an antique is genuine. For example, pottery will often have a mark which should be checked. Silver and gold antiques should also have a hall mark.
probably a makers mark
silver mark 865
yes he dose its in london
E-gunparts.com
The mark for sterling silver is 925 which indicates 92.5% silver content.
Could be an inspector's mark, assembly mark, etc..