Bulgarian Mystery

Herb, In thinking about it, it does sound like your frame is in fact an 08 Bulgarian with the safety markings milled out and renumbered to the standard 1908 Commerical range. Your receiver should have the DWM logo over the chamber where a production date would appear on a standard P08 and the center toggle link should have a rampant lion, in place of the standard DWM logo. Sounds like an interesting parts gun. Perhaps reworked by the Bulgarian during WW2, when they were converting their earlier 7.65mm models to 9mm.