Try this link.... might get you closer to an answer
http://www.wehrmacht-awards.com/uniforms_firearms/firearms/p38/p38index.htm
The Date is located on the slide of the pistol. Look for a code such as "AC41" or "BYF40". The alpha characters are the manufacturer's codes, and the two-digit numbers are the years (i.e. 41=1941). I think AC is Walther and BYF is Mauser.
Impossible to answer without the serial number.
1969-1984
look on ask or goggle
Have to know if it is prewar or postwar.
http://www.p38forum.com/
No such sn in the Walther convention
You will have to contact Walther
You will have to contact Mauser
Someone over at P38forum.com might have access to sn data.
You will need to contact Walther.
You will need to contact Walther to find out.
You will need to contact Walther
You will have to contact Walther to find out.
You will have to contact Walther to find out.
You will have to call Browning with the serial number.
No such serial number in the PPK/S range.