[Dan Case]

Originally Posted by rsk289

Most common reason for early replacement of clock: Smiths clocks of the period (mostly all with the same movement, regardless of case style) only worked for a few months before failing.
This top/bottom adjust style with the rounded bezel was designed for the Zephyr/Zodiac range, if memory serves.

The Ford USA sourced Cobra specific clock for CSX2201 and later cars was not very robust either. The cases were not tightly sealed and just a little dust or moisture could foul them enough to stop the weak mechanism. Dust in an open roadster? Moisture? Just kidding my cars get lots of dust and on tours lots of moisture (and snow in the cockpit a couple of weeks ago). I gave up trying to keep the original clock in my black car going back around 1986. The clock for my red car is stored away for someday while a fuel pressure gauge occupies that location.