S.Smith & Sons (MA) Ltd London - Time Of Trip cockpit clock.
A nice example of a MK IIIB Time Of Trip cockpit clock in original
condition with clear glass and good dial.
Smiths used a fine quality Jaeger-LeCoultre movement for accuracy
The MK IIIB has a 24hr dial with separate 12hr subsidiary hands
for the Time Of Trip function.
This version was occasionally fitted to Spitfire & Hurricane aircraft,
but mostly with long range bombers where flight duration and fuel
burn was calculated.
The clock is in working condition, with all functions operating and
resetting to zero. It does gain several minutes per day, so will
require a service at some point.