blomman Mr Blue
38586
Another great article, CC!
You are really on a roll here with great articles!
One note on this theme -
GP started to make these Tri compax with similar design already in the 1940s...
Through the 1950s and 1960s....
And even into the 1970s! This scan is from 1971:
Long tradition of chronographs...!
Best
Blomman