[Researcher]

A possibility is that the inspector with the star of David stamp replaced the inspector with the sun stamp near the end. I also find the star of David stamp on 242301 and 242353.

242301 01 XK X = December, K = 1941.jpg

242353 LL L = February, L = 1942.jpg

What the authors called a semi-horseshoe on page 582 may have been a poorly struck example of this --

241331 EG E = Oct., G = 1938.jpg