A P42 CHRONOGRAPH was fixed to the outside of a parachute jump plane.

In 6 hours: 17 take-offs, 17 landings. Altitude: 4500 metres.
Temperatures: down to -9°C in the air, +24°C on the ground.
17-minute ascent, nose-down descent in less than 3 minutes at 8000 feet/minute…
The plane landed before the parachutists…

Thermal shock, vibrations and variations in pressure were no obstacle to the accuracy and waterproofing of our P42C.

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