ETA Valjoux 7500
From Chronopedia
ETA Valjoux 7500
The Valjoux 7750 is one of the most famous chronograph movements in the world. Now owned by ETA (Swatch Group), it is regarded as the typical workhorse chronograph movement. A cam and lever system operates the chronograph function as opposed to a column-wheel. Designing, developing, and producing a chronograph movement is terribly expensive, thus only brands with enough spending and production power can manage to keep it relatively affordable (Omega, for example). For those who can’t, there’s the Valjoux 7750 movement.