Oh by the way. someone indicated a date of MFG for this gun from 1898 - 1924. Did they chamber 12GA for 2 3/4" shells (70mm) back in 1924? This gun was originally chambered to 2 3/4".

I think this gun is newer than that but I could be wrong.
The last 2 digits of it's 4 digit serial number is 77. Could that mean anything? I looked at the alphabetical legend of date codes but don't see anything obvious on the flats that stands out as such. There is a "P" under the lion maybe thats it. I dont know.