Couple o' puzzling things about this one...

1 - To the best of my knowledge Armand Swenson never did any DA conversions. All kinds of innovative accurizing, and cosmetic, upgrades, plus the legendary ambi-safety, but no DA I don't believe...

2 - I spoke to Armand when I ordered an ambi safety for my 1st - very early - Detonics. At the time he was semi-invalid, (having suffered a stroke iirc), and not really doing any active smithing anymore. So the concept of him doing a DA conversion on a CM at some later date seems rather unlikely to me.

Perhaps it's a Seecamp, with some Swenson parts, or...?