Walther pp .32

I recently bought what I believe to be a walther .32 model pp. I started to look into its history but everything I found didn't match. What I did find out was that it was made in 1966 but other than that it's a total mystery.i added some pictures but had to leave out the serial number do to the place that I bought it stamped there location on it but the serial number is 354XXX with no letter after or before. With ulm house proof mark and eagle with a N underneath. I was wondering if anyone can help me figure it out.