Ken:

Maybe a consensus between us might shed some light. On all the other examples I would agree but this example has the set of 4 cavemen in addition to the intertwined "SS" for Sauer & Sohn and other than Jim Cate noting otherwise, I would say it was fully made at the Sauer plant. I think the number of cavemen was a fore-runner of the large and small Sauer crowns of quality & shooting performace. Depending on the date, HAL may have used a set of tubes off a Sauer completed gun so I invite your reasoning and note that the "HAL" was probably added as a control mark or something of the sort. Thanks for the effort and info.

Kind Regards,

Raimey
rse