Do you have a name in the »The King's English« for the side bolster profile¿ I guess more of an engravers term? But one mainly sees this type adornment / frame filing on Berlin offerings and gunmakers like Foester, J.J. Reeb, Fischer, O. Geyger, etc. which I will get the list.
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=206427I have never seen an APUN on the Sauer Sow-Bellies. But remember that the Germans were cheap & proud. Not as Cheap as the Indians, but Cheap. For the most part, H.A. Lindner was about the only maker to pay the APUN for the A&D Body Action with »Belts & Braces« and have them stamped @ the Francotte Satellite Stamping Station in Liége. All the other makers tried every other platform known to man, and waited until the Protection Period Expired, before they succumbed to adopt the A&D Body Action and then modify it to the Kerner-Anson Platform, which was the workhorse for German Platforms.
I seem to recall the Facile Princeps arrived on the scene in the 1880s so Sauer waited until the Protection Period Expired. Too Remember that Europe, for the most part, was ruled by Brits and until each Country developed their own National Identity, they longed to be Brits and desired British things....
Hochachtungsvoll,
Raimey
rse