I just picked up a Greener miniature Martini club rifle at the local gun show. I am not very familiar with this style action. It has a lever on the left front of the action that appears to be for the barrel takedown feature. There is another lever on the right side of the action, above where the action lever pivots that I assume is some other type of take down feature - like detachable lockwork. Can anyone provide some information on this action?

Also, the bore looks to be in very good shape. But I suspect that the barrel has been relined in the past. The suspicion is based on the fact the muzzle is counterbored about a 1/4". How can I determine if the barrel has been relined? I bought this assuming I would need to rebarrel the gun, but if the barrel is original I might at least try to use it.

Forester