The dial of this inking chronograph is calibrated for 60 seconds with Arabic numerals, the large central hand contains the ink bowl with discharging pointer, a subsidiary dial for the 10 minutes recorder counting from right to left. The chronograph stop/start functions activated by sliding a lever in the band.

The inking chronograph was invented in 1821 by Nicolas-Mathieu Rieussec, watchmaker to King Louis Philippe of France. It operates by means of a hand composed of two parts: the lower part is fitted with an ink bowl and the upper part with a thin needle which, when activated, compresses the lower part to release a trace of ink on the dial to give a visual read-out of the elapsed time.

The French firm of Gustave-Roger Sandoz, goldsmiths, jewellers and watchmakers in Paris, was founded in 1865 by Gustave Sandoz (1836 -1891).