to describe it:
it is in a metal case with a timber insert
the timer itself has heuer in the typical heuer 5 sided logo on the face, the logo is in just blue outline and made in switzerland on the bottom of the face
there are no other markings on either the face or the rear of the case, I am unwilling to open it for the moment.
it is a countdown timer, the inside is 4-0 in red lettering with blue borders
the numbers around the outside are blue and countdown to 0
the hands are red, the inner hand is quite thick but short with a point
it has a round winder with a ring mounted to the stem (pardon me if my jargon is incorrect)
at the 30 position (ie 6 o'clock) it has a half d ring with a rope strap.

it seems to be specifically a 5 minute timer which about what i'd expect for a race start timer.

i acquired this from a museum dispersal sale about 5 years ago through a very reputable auction house but i've yet to establish exactly what it is.

it doesn't seem anywhere near as 'pretty' as the 1960 version so I assume its possibly an earlier version.

oh and yes it still works, resets etc.

Ah, I guess then my question is simple - can someone please tell me what is it?

thanks!