Hello and welcome to the forum.
Based on a quick glance over my lunch break this appears to be an early ‘occupation’ pistol dating from mid 1940, prior to the introduction alphanumeric serial numbering introduced by the Germans after the initial production run.
There’s no doubt that this pistol has been refinished and also resurfaced as some of the normally sharper finished edges appear rounded in the pictures. My bet is the slide markings have been ground off prior to re-bluing.
The serial numbers are not pre-war. The slide has had a second set of serial numbers added for some reason, possibly suggesting that the slide originated on another Vis -? The original slide serial number should be stamped onto the underside of the slide, and only visible when removed from the frame.
All in all a strange Vis. No surprise that it still operates well. These workhorses took a much worse abuse and still fired faithfully. I’ll look it over more closely when back home this evening.
Regards,
Tony
Vis Radom Pistol Serial Numbers Chart
A series of about 3,000 pistols, all dated “1939” on the slide and stamped with the highest serial numbers recorded, holds one of the many mysteries in the history of the Vis 35. The Vis 35, or Radom, proved itself one of the top 9mm service autos of World War II. One of the first orders of business was to get the military going again. Though many non-endemic arms were adopted by Polish forces out of necessity, arms design did continue apace, resulting in one of the best auto pistols of all time, the Vis 35 Radom. Only a few thousand were made in this configuration. I think they are only found in the second 'K' serial number range. As the war ground on, the Germans were always looking for ways to make things cheaper or with substitute materials. Earlier Radom pistols made in Poland had blue finishes and hard rubber or bakelite grips. The weight of the pistol kept recoil down and it was a really fun gun to shoot.Left side of the pistol shows typical early stamping of 'F.B.Radom VIS Mod35.Pat.Nr15567'. Also present are the correct German proof markings.Right Side of the pistol has the serial number on the frame.Overall the blueing is in about 92-93%.