Fabrique d’Horlogerie de Fontainemelon Caliber FHF 97

Manufacturer	Fabrique d’Horlogerie de Fontainemelon
Caliber Number	FHF 97
Other Names	Standard 97, ST97, ST-97
Movement Type	Mechanical, manual wind
Lignes	11.5”’
Diameter	25.6mm
Height	4.5mm
Jewels	17
Vibrations Per Hour	21,600 bph, 3Hz
Power Reserve	~46 hours
Lift Angle	52 degrees
Anti-Shock	Incabloc
Features	Hours, minutes, central seconds
Country of Manufacture	Switzerland
Known Models	Limit of Switzerland, Limit International, Gradus, Titus (Please add your watch in the comments below…)

The FHF caliber 97 is a vintage Swiss made mechanical hand-wound movement with 17 jewels. FHF stands for Fabrique d’Horlogerie de Fontainemelon. FHF was founded by David Benguerel, Isaac Benguerel, François Humbert-Droz and Julien Humbert-Droz in 1793 and was one of the earliest ebauche movement factories. In 1925, it became part of Ebauche SA. FHF produced affordable caliber they called “Standard” movements until the 1980s. In 1985, FHF officially became part of modern day ETA.

FHF 97 VS FHF 96:

The caliber FHF 97 featured here is similar to the FHF 96 with the main difference being the beat rate. The FHF 97 beats at 21,600vph and the FHF 96 beats at 18,000 vph.

FHF97 assembly videos:

Caliber submitted by @jimhamilton631