Mathey-Tissot Chronograph

Mathey-Tissot
Chronograph with 12-hours-counter
Full-Calendarium and Moon-phase-display
Case: 18ct yellow-gold-case
silver-plated dial with setted indexes
Movement: Basis Valjoux 72
monometallic Ring-balance
Flat-Balance-Spring
Diameter of case: approx. 39mm (without pusher)
with original-black Kroko-Leather-strap, 20mm
and original pin-ending

Mathey-Tissot is a Swiss high-quality watch manufacturer.
Edmond Mathey-Tissot (1858-1929) started a watch-manufaction
in 1886 in Les Ponts-de-Martel (Katon Neuchatel) and started
with the manufacturing of high-qualified and complicated pocket-watches.
(from Watch-Wiki)