: Have you noticed the man at the center of the picture and logo that
: is visible on the left arm of the white jacket?
Thank you Stefano. I was on the track for HKS in Japan since few days but my "old" eyes couldn't see with accuracy if the logo appearing on the HKS founders'jacket was the same. Actually, it looks to be our best assumption. Given that HKS has been founded in 1973, this also give some indications about the date of that model which does not appear in the catalogs (at least those for which I have a copy).
Founding some traces about how and why Heuer has signed a deal with that Japanese company would be the grail !
Thank you all for your interest and feedback.
Jean-Pierre