Foire de Bâle 1963 Documentation photographique Foire de Bâle 1963 Onsa — 307186
Swiss Watch Fair 196 One of the wide range of underwater watches on display in Basle. This rugged automatic with calendar is designed for heavy duty use and guaranteed to a pressure of 20 atmospheres (600 feet). It has a turning bezel - worked by the upper crown - under the dial. (ONSA)