An early 20th Century Swiss 8 day lever with visible escapement in a silver open face case. Hebdomas keyless eight day movement with the large resting barrel covering the back of the watch marked “8 Jours Ancre – Qualite Supereuer Garantie – Spiral Breguet Levees Visible – Swiss Made”. Engraved bridge cock below the dial, polished steel regulator. Uncut bimetallic balance with overcoil hairspring. Club foot lever escapement. Unusual signed black enamel dial, white Arabic numerals, luminous hands. Engine turned silver open face case, vacant shield shaped cartouche. Maker's mark “GS” in a rectangle.