Here's what info I have on the ser# ranges for both the Bulgarian and the German/Nazi contract STAR Model B pistols.
I still see many of the Bulgarian Model B pistols around at shows with the faked WaA marking on them. Don't pay a premium for it.
They are the same pistol made about the same time as the German contract and if you just want a shooter, there you are.
Bulgarian Contract Star Model B:
Date Ser# range
9/9/43: 225007 to 225775; 226101 to 230331
12/2/43: 230332 to 230375; 230826 to 231756; 231758 to 235782
3/23/44: 235901 to 240900
These are the pistols that flooded the USA surplus market in the 90's. MAny were remarked WaA251 in attempts to cash in on the higher value of the German contract pistols of the same model.
The Bulgarian Contract guns were standard Commercial Model B STAR pistols. Nothing special on them as far as markings to indicate property of or issue by Bulgaria.
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Nazi/German contract STAR Model B pistols:
May 15 and 28, 1942. Serials 210951-214950 (No Waffenampt on these IIRC)
July 26, 1943. Waffenampt WaA251. Patr. 08 added to slide inscription(?)
Army: 214953-216200; 216251-217502; 222457-222675; 222701-222750; 223776-225006.
Navy: 217503-218042;218044-218048; 218050-218123; 218125-219400; 219501-219530; 219532-219950; 220026-220942; 220944-221200; 221976-222456,
May 29, 1944,
Army: 244503-247002, Navy 242003-244502. Patr. 08 added to slide inscription. Waffenampt WaAD20.
June 6, 1944 248001-254300, and 254551-256250.
Last Shipment - never made it to Germans.
256251-258000, and 260001-260250.
These went to West German Police after WW2
Some of the numbers and dates may be challenged by finding other listings of the ser# range for both contracts. I've come to expect that but when dealing with old records. But these seem to line up for comparison purposes.
The faked Waffenamp marking is generally easy to spot on the Bulgarian pistols as it's not quite 'correct' looking. looks like it was applied earlier that same day, and in many cases it's a sharp and raised stamping but under the bluing on otherwise heavily refinished guns.