I may shoot some 2 1/2" shells though it once in a while. I also have a Sjögren shotgun that needs them. I mostly just bought it for the wood figure and it was only $700 which I thought was reasonable. Old Western Scrounger has been importing some odd doubles.

https://www.hallowellco.com/british_proof%20marks%20-%20syntax%20by%20date.htm

This was where I was getting my proof marks. The 13/1 mark may place it at 1896. This is just my guess.