It is usually impossible to know, with absolute certainty, whether a particular watch is a rare, on-off prototype or a rare, one-off fake. We can only approach the point of certainty (a) when someone in the right position at Heuer tells us that certain prototypes were made [for example, the 28,800 vph movements] or (b) when someone tells us that they have produced a fake [as we saw with the oversized fakes, several years ago].

Between these two points on the spectrum, we examine a watch, consider all available information, and try to arrive at a conclusion -- was it made by or for Heuer or was it made by a thief / faker / scammer [or even a well-intentioned watchmaker having some fun with the spare parts, after hours]?

I look at the watch that you are presenting, and my conclusion (which is nothing more or less than one person's opinion) is that this watch is a fake. The dial looks genuine and the case may be genuine (difficult to tell from the photos) . . . the rest looks wrong to me. We see:

• the wrong time of day hands, never used by Heuer with this movement (and far too short, to my eye),
• the wrong chrono needles, not used by Heuer
• the wrong bezel, never used by Heuer
• the wrong marking on the movement, placed upside down, and
• the wrong marking inside the case-back

: There are NO numbers on the watch..
: not mil markings and neither reference nor serial between the lugs.

: Caliber / dial / case / movement are all EXACTLY the same as the
: 72. Reference 73363 Military
: except there's no IDF numbering on the back, and smooth crown and
: pushers. Brushing of the case: top surface brushing follows the
: contours.. the thin edge is polished, the sides is vertically
: brushed and it's looks CRISP.

:
:

: The correct valjoux 7733 is inside, but the heuer leonidas sa on
: the bridge is up side down, correct spelling and font but
: engraved, not stamped.
:
:

: still not convinced, if they did so much effort why not mount a
: more "fitting" pair of hands?