Times change, and in 1929 the watch world looked completely different as it does now. While today Cartier is a fully integrated manufacture, in the 1920’s they just entered what would be a very successful partnership with Edmond Jaeger and also obtained high-end movements from other manufactures like the one in this watch, from Audemars Piguet.
A very subtle and discreet watch, it actually houses an impressive complication, especially for the 1920’s. The lever on the side already shows a hint of this, because it is, in fact, a minute repeater, of which even Audemars Piguet only made movements between 1906 and 1929. Read the entire article on Haute Time