... for your kind and enthusiastic comments about the GP monopulsoir chrono!
Nicolas: the case is 36 mm diameter and got a Valjoux GHT22 inside, circa mid 1940´s.
Blomman: Lol! ... Not hidding it ... Lol! ... I have presented it here at the GP forum on May 1, 2014. I tried to copy and paste the link to my post here but regrettably it was not accepted. May be you can find that post in the Forum Search feature.
It is one of my favorite pieces in my little old chronos collection, and I´m so glad you guys like it.
Thank you again, and cordial regards, Abel.