squidsix I went on the big auction board and did a general search for "Devel". Top of the 1st page, on the right is a "7 round Devel magazine".
Looks pretty close to what you have there. And there is no finger rest either. Might just be a Devel mag. But didn't he always mark the baseplates with a stylized "Devel" ?
Seeing the current prices for Devel, Trapper and ASP pistols makes me appreciate my CS9 even more!
Regards 18DAI