Hello all, I picked up this LC Smith recently and I just wanted to make sure I was correct with it’s information and also make sure I was safe with the gun itself.

So a few questions, does the O under the serial mean this gun is an early 1900’s mfg shotgun, instead of a mid-20’s shotgun like I originally thought based on serial number sourcing from this site and ATF C&R listings?

2.75” shells and snap caps will chamber just fine in the gun, but would this be unsafe and would the gun be actually chambered for 2.5” or 2 9/16” shells given it’s mfg date? I really like the gun, and want it to be my clay destroyer. I just don’t want to damage it or have a spontaneous disassembly into my person. The barrels do not have any other markings that I can see on them at all to help me with these questions. I can upload more pictures as needed. Thank you in advance for any help you may be able to provide!