My latest watch acquisition....

[Alcan]

An early 1960's Heuer Monte Carlo 3 button rally timer complete with dashboard mounting plate!

Back in the day this was what navigators used to time sectors during rally racing. All functions still work.

Here's an overview courtesy onthedash.com:

http://www.onthedash.com/history.shtml

Monte Carlo Overview

The Monte Carlo (12-hour stopwatch) was introduced in 1958, as the successor to the Autavia. The Autavia’s 12-hour register (at the bottom of the dial) was replaced by a 12-hour jumping disc, visible through a window, just below the center of the dial. The early Monte Carlos had three buttons, with the left button advancing or resetting the hour-disc and the right button resetting the minute and second hands. Three-button Monte Carlos all used the A. Schild 1666 movement. The two-button Monte Carlo was introduced in 1967, with the right button (pusher) resetting the hour disc, as well as the minute and second hands. The use of the Valjoux 7714 movement in these later Monte Carlo required that the case be thicker (15mm), and it is this deeper case that lead to the other dash-mounted Heuers using deeper cases, in order to match the thickness of the Monte Carlo.

Not exactly sure why I bought it , but its another interesting addition to my eclectic (Nancy would say hodge-podge) collection.