As I was looking in the 1st exec over the last few weeks I briefly looked into these as well
the highest serial number I found is 59793 , yours is actually the lowest serial I have seen

First execution Case with second execution Dial

59149 – 59793

As there are 644 serial numbers between the lowest and highest number I think its a safe bet to say that Heuer had 1000 pcs made of these ?
Where my own investigation about the 1st exec's pointed to 500 each for the 1st exec's

I hope this helps ?

-Rene

: Hi @all, do anyone knows the number of pieces that was made of this
: version?

: I think this version is more rarely found than the 1. exc. case and
: dial. What do you think? Is another example here in our
: community?

: Please show us yours and the case number, mine is 59149