[Danny]

There were no PPKs listed in that sn range. It should have a 1 in front of the serial number. Looking closer at the pistol I can see where there are slight mill marks, All the PPKs I have & the ones I have researched in the C/N lot have a high gloss look with no mill marks. So I think someone has removed the number 1 which would make it an early million series pistol. Once again your SN is bogus and has been altered. This could be an issue with the ATF.
The serial numbers for the PPKs are as follows. First production is 752000 up to 1000000. There were 10,000 made in the million series and then Walther started with number 172000k up to 262722k, which was the last C/N pistol. Then in 1940 the C/N was changed to the E/N pistols, both in the PPK or PP handguns. So since your pistol has been altered, which again is a crime to alter a sn on any weapon, my judgement would put it in a shooter grade class worth no more than 350 at best.
It really is ashame someone would do this to such a fine collector grade Walther that could have been priced over 1k dollars. Hope this helps?
Danny