Early Nikkor-Q.C 13.5cm f3.5, Leica L mount. Made by Nippon Kogaku. Tokyo engraving. Marked Made In Occupied Japan.

The serial number is 254xxx. This example belongs to the 253xxx–256xxx range, which follows immediately after the earliest transitional batch 5006 when the aperture designation changed from f4 to f3.5. The production period is believed to be around 1951.

It closely resembles the Leica-mount examples from the 5006 batch, with the main difference being the serial number on the name ring. The filter rim at the front of the lens is fitted with the black ring seen on early examples, screwed in place, though its purpose remains unknown. The depth-of-field markings are also consistent with the earliest specimens. The lens alone weighs 657g.

The included finder is also Tokyo engraved. The hood is metal, with a two-piece construction designed to accept Series filters. Although it shows cracking, a slip-on bakelite hood cap with MIOJ marking is also included. A fine addition for any collection.

Minor signs of use such as slight scuffs can be seen, but overall it remains in very clean condition with little wear. The plating is also well preserved with no visible deterioration.
Fully overhauled in 2026. The aperture and helicoid operate with exceptionally smooth action, and rangefinder coupling is spot on.
A very slight haze can be detected in the middle element only under strong LED light, but it should have no effect on actual shooting.
Comes with hood, hood cap, finder, rear cap, and separate leather cases for both the finder and the lens.