Graflex and Meyer-Optik Görlitz
14 and 12 researched events on one shared scale. Graflex 1887–present, Meyer-Optik Görlitz 1896–present.
The axis stretches where either maker has research and collapses where neither does, so a year sits opposite the same year on both. Event counts differ because research depth differs, not because one company did less.
Graflex1887–present · 14 events · 5 concurrent threads
Meyer-Optik Görlitz1896–present · 12 events · 2 concurrent threads
Read either maker on its own: Graflex · Meyer-Optik Görlitz