Found it. Here are the serial number ranges for the Bulgarian contract pistols;
Bulgarian contract pistols fall within particular serial number ranges and were delivered in three groups of 5000 pistols each starting in;
9/10/43
225007-225775
226101-230331
2/12/43
230332-230375
231783-235782
3/3/44
235901-240900
As a note agentcq, Ñ denotes 1943 production, and O 1944.
Bulgarian contract pistols fall within particular serial number ranges and were delivered in three groups of 5000 pistols each starting in;
9/10/43
225007-225775
226101-230331
2/12/43
230332-230375
231783-235782
3/3/44
235901-240900
As a note agentcq, Ñ denotes 1943 production, and O 1944.






















































