Forumners,
I was walking through a medieval market town when by happenchance, I came upon this Heuer timepiece in an olde shoppe.
It was still in its box and appeared unused or at least, little used.
Heuer I.F.R.
With only two pushers, one of which, also serves as the winding crown, I think it is a chronoscope of some sort.
When activated by the top pusher, a strange whirring sound emerges but the seconds hand moves, well...a circuit each minute.
That minute elapsed is indicated by a jumping digital display.
There are only 12 minutes available on the minute totalizer before it reverts to zero minutes.
Activating the top pusher again will stop the clock and the side pusher resets everything to zero.
Heuer I.F.R.
The power reserve is about an hour, albeit measured in epochs of 12 minutes.
Despite the very fast whirring sound of indeterminate frequency, the seconds are not subdivided nor is there a fractional seconds hand to show 1/10th or 1/100th of a second.
So, it appears to be a 12-minute chronograph with a resolution of 1 second only...
That's all I know...…
MTF