The Heuer Connection.
There is an interesting connection with Heuer in this puzzle.
On Friday, 4 June 1982 Lemania (under the current ownership of the Piaget family) took control over Heuer. This control remained until January 1st 1986 when TAG finalized their purchase of Heuer SA.
Heuer had been using the 7765 movement for budget chronographs shortly before,and during, this period.
I believer there is a good chance that this small series of watches for BBC actually came to use 7765 movements from the Heuer stock as it would have been available, and Lemania would not have had to go directly to one of their key rivals and competitors ETA/Valjoux.
An indicator of this thesis is found if one compares the bezel ring (not the dial itself) between this (Lemania ref 11001) 5100 Heuer Carrera, and my BBC Lemania ref 12001 watch. Coincidence? Perhaps, but I don't really think so.
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