M.S.R.
From Chronopedia
In 1961, Buser joined with Revue, Vulcain and Phénix to form Manufactures d’Horlogerie Suisse Réunis SA (M.S.R.). In 1973 Marvin also joined M.S.R. The Buser name started to take a back seat in watchmaking from there (as did Phenix), but Buser were reputed to have moved into pressure measuring instruments before seemingly disappearing as a company.
