Most German wartime pistols and rifles were manufactured in 'blocks" of around 10,000. They would then proceed to the next letter. There could be two blocks of the same letter made in different years.
You should have a manufacturer's code on the pistol like AC (Walther) or BYF (Mauser) and the year made after it. Such as BYF43. Look for these codes to get your info and go from there.
There are serial number tables that have been published.
You will need to contact Walther to find out.
Need to know what model and caliber.
Walthers were made in 2 different locations in Germany, and in France. we need to know the model of your "Walther gun".
Germany. 1970's or so
Impossible to answer withou a serial number and DETAILED DESCRIPTION of all markings.
Someone at the p38forum.com might be able to help you.
Someone on p38forum.com might be able to help
Need a detailed description of ALL markings.
Serial number and or proof marks
send me the serial number and I might be able to tell you when it was made..............
Your question does not include if there are any german military markings associated with this P-38 pistol.That being said and the high serial number,I would assume that it was made after 1945.It could be made by Walther any time there after.You may want to contact Walther directly and see if their customer service dept may be of some help.