Greggy D.,
* "c" block.
* Jan Still,
Third Reich Lugers states 135,500 Code 42-1940 P.08's were made in the S/N range 7700z to 7000n. Yours fits right into that range.
* Assuming linear production, which was unlikely, you can interpolate an assumed day of Mfg. Likely you'll be +/- a month of the actual.
Respectfully,
Bob
