: If it's a Heuer, and it is powered by the Landeron 13 movement,
: then it can only be one of four references. Easiest way to
: differentiate the references is by the cases / pushers, as
: follows: Reference 2402 (cylinder case; oval pushers) Reference
: 2403 (traditional, round case; oval pushers) Reference 2406
: (waterproof case; round pushers) Reference 2433 (extra flat
: case; rectangular pushers) So you have a Reference 2406. Within
: the Reference 2406 models, there is a considerable variety of
: models -- black and white dials; radium and non-radium numerals;
: and the usual selection of tachymeter and telemeter scales. So
: yours is the black dial, radium numerals and hands. If I recall
: correctly, we first see the Reference 2406 around 1942 / 1943.

: I don't know of any military connection for these watches, but we
: are always learning new things. It does seem common that people
: list watches for sale, with some sort of claim of military
: issuance, but with no markings on the watch, papers, etc.
: Perhaps we will learn more about this, somewhere down the road.

: Jeff

: +++++++++++++++++++++++++++++++++++++++++

Thank you as always Jeff - that information tallies with what you said elsewhere a while back. I agree with the military comments - without markings it's very difficult to confirm either way and I hope more information comes to light. I'm very much looking forward to seeing the fruits of your research - these older Heuers are missing a lot of research compared to the newer "more desirable" models.