The watch was originally gifted to aircraft engine designer, Donald Chapman, who manufactured planes at The Bristol Aeroplane Company during WWII and beyond.
The timepiece, which dates back to the 1930s, has a stainless steel case and is numbered 50737. It features a silvered dial with baton hour markers, subsidiary recorder dials to three and nine and an outer tachymeter track.
On the back of the piece, an inscription bears “WATCH OF HONOUR FROM BRISTOL ENGINE DEP AHRF 1940 TO D J CHAPMAN”.
It was designed before Edmond Jaeger and LeCoultre merged in 1937, which accounts for its “unusual” Jaeger model.
Natasha Davis, watch and jewellery specialist from Fellows Auctioneers, said: “We are delighted to have this watch up for auction because items such as this with great history always generate a lot of interest.
“Donald Chapman had a phenomenal career in aviation and engineering so we are hugely appreciative of Matt for bringing his grandfather’s watch to us. The Jaeger is included in our first flagship Watch Sale of 2020, which I’m sure will be a hugely popular auction.”