rare caliber in a drilling- 16 ga and 405 Win. sold by "C. ULBRICHT. HOF-BÜCHSENMACHER DRESDEN."
no doubt made in Suhl/Zella Mehlis
https://www.hermann-historica.de/de/hahn...;currentpos=131

side lock drilling by Thieme & Schlegelmilch 9,3x75R and 16/65,SN 37501
https://www.hermann-historica.de/de/seit...;currentpos=133