1931 Wilhelm Weltersbach catalog from the HUBERTUS products site.

I believe the old knives probably have the PUMP logo and the later post war models have WILH. WELTERSBACH over SOLINGEN-GERMANY or WEIDMANNSHEIL over SOLINGEN over GERMANY.

Note the top knife has the large 26 cm blade.

Web capture_20-6-2023_204555_www.hubertus-solingen.com.jpeg (53.96 KB, 410 downloads)
1931 Wilhelm Weltersbach
Last edited by C. Wetzel-20609; 08/20/2023 08:32 PM. Reason: added more information.