Arsamatic Precision Sous-marine 50In the mid 1960s, when recreational diving was expanding beyond military and professional circles, Arsa positioned itself as a manufacturer focused on reliability and mechanical integrity. Founded in 1898 in Grenchen as Auguste Reymond S. A., Arsa built a solid reputation for producing dependable in house movements with a pragmatic, engineering driven approach. The Arsamatic Precision Sous Marine 50 m from 1965 embodies that philosophy. Its steel case