This cartridge seems a bit of a mystery in the sense that it has a very unusual semi-rimmed case with the appearance of a raised base due to it having a very thin rim. It has the same base diameter as the 7.5×53 Schmidt-Rubin (SW20). It might have been used for both target and hunting purposes in modified Schmidt-Rubin straight pull and Martini type single shot rifles.
Various speculations regarding the origins of the case have been offered, however even some of the Swiss experts cannot confirm which of these are true:
1: Manufactured from rimmed cases (but no such case type is known)
2: Not produced by Swiss Government Arsenals and made just after WW1 from components outside of Switzerland
3: Manufactured new for Vasella by the Government arsenal EIDGENOSSISCHES MUNITIONFABRIK at Thun.