1938 S/42 'parts marking' as pictured in kenyon's lugers at Random page 370
 

Serial # is 9057, O block, which I believe falls outside the 1938 range and into 1939 production.

Receiver and barrel with no serial numbers, but S/42 marked on left of receiver where serial number would normally be. No WAA's or firing proofs on right side of slide, but barrel is stamped E/655...1939 production?, as per Kenyon's photo's, but no index marks on barrel/slide, all toggle parts and internals including firing pin marked 57, as per normal.

The bottom half is all matching, including mag, which is E/63 marked, grips are 6 digits off.

Rare or just unusual? Kinda spooky looking without proofs and serial numbers. I have never encountered one, but remembered seeing the variation pictured.

Would really appreciate any information on this anomaly from the experts. Sorry about no scans, but will try to post if there is any interest in seeing it.

Thanks in advance for any help/info.

please see attached pics