Stroun Frères owned the brand Camy. The firm was founded in Grenchen in 1913 and later became Camy Watch SA.
It houses a Landeron 4750 movement that is marked “”. In the pictures below, all three watches contain the L4750 movement and all three are waiting for some love-and-attention. The Camy Geneve is the one in the top right — sadly, the dial is not in good condition.
Note: For details on the use of modern batteries in Landeron 4750/4760 based watches, please see the relevant page in the Landeron section of this site.