Well the FWB ledger could be wrong, I suppose. The text of the email from FWB that I received was:
"Dear Sir,
Thank you for your email dd. June 09, 2014.
Please be informed that the first serial number of the air pistol model 65 was 1040 and the last number was 146352.
The model was produced from 1965 until 1998
Mit freundlichen Grüßen | Best regards"