It's not designed to do so. (No.)
plenty of difference the ppks is a shortened version of the walther pp - it is not a ppk - thanks to stupid govt regulations
The PPK/s is a PP with a PPK slide.
1969-1984
100-1000 without more information.
no published sn data.
100-1000 USD depending on specifics
Someone on the P38forum.com might have access to that kind of data.
You might have better luck on P38forum.com
No such serial number in the PPK/S range.
Anywhere from 100 to multiple thousnands of USD
100-1000 or so
Take it to a professional who specializes in air weapons.