That's the pics. The Krupp tubes were sourced to Wilhelm Kelber and I'd guess Meffert finished it. For some reason, some like Axel Eichendorff(born just after WWII and lives there as a forester I believe) think the heart shaped "WK" notes that Wilhelm Kelber fitted the tubes. But until yet I don't subscribe to that thinking because I think it was more of a forge mark and that the script initials "WK" closer to the forend lug would note the fitting task. Take Louis Kelber for example. His forge mark is a an encircled(jagged) "K" and many tubes in Austria/Bohemia/Germany bear this mark. When he contributed additional effort, one sees the script initials "LK" closer to the forend lug. Why would Wilhelm use a reverse method in order to recieve compenstation?? Are there an initials on the tubes close to the lower rib near the forend lug? Yes, it has 2 triggers but the right one looks to be a single set. Push it forward and see if it sets.
Kind Regards,
Raimey
rse
