This base mount and tripple ring scope sytem is made by SSK industries.
This is the TSOB model which stands for "Tough Son of a ....made for big recoiling hanguns.
This one came off a Freedom Arms single action 454 Casull.
This system is listed for $112.00 on the SSK site.
It goes to a new handgun for $65.00.
FTF Portland West side
... pls send conversation.