You have the date range correct. Simple proof, no indication of double or triple proof. Again pictures of the entire gun would help.

Like the 12ga, this one needs to be seen be a competent gunsmith. Have the chambers measured as well as the barrel wall thickness.

If they check out, you can purchase pressure correct shells for both guns from RST. http://www.rstshells.com/rst_classic_shotshells_shotshells.htm


Pete