Walther PPK Age/Info/Value

Hello, I just bought a PPK 7.65 with a serial number of 7800xx. It has a Crown N on the barrel and frame. There is no K after the serial number. it looks like it is in great condition with the only real wear on the front strap and a little bit of muzzle wear. The lanyard loop is a little bent. It came with the holster which is a leather shoulder holster. There are no military marks on this pistol. I think it is 1932. Any other info you could provide including value would be appreciated. Thanks!