Tissot Caliber 744

Brand	Tissot
Caliber Number	744
Base Caliber	ETA 2551
Movement Type	Automatic, self-winding mechanical
Lignes	7.75”’
Overall Diameter	17.5mm
Casing Diameter	17.2mm
Height	4.5mm
Jewel Count	21 jewels
Beat Rate / Frequency	21,600 bph / 3 Hz
Lift Angle	Unconfirmed
Power Reserve	~42 hours
Rotor Winding Direction	Bi-directional
Anti-Shock Device	Incabloc
Hand Count	3
Functions	Central hours; central minutes; central seconds; date at 3:00
Hacking Seconds?	No (unconfirmed)
Quickset Date?	Yes
Country of Manufacture	Switzerland, Swiss made
Known Models	Ladies Tissot PR516 (Add your watch to the comments below…)

The Tissot caliber 744 is a small size automatic movement found in various Tissot ladies watches. This movement is essentially an ETA caliber 2551 and was produced in the 1960s and 1970s (circa 1967~1972?).

Tissot 74X:

The 74X family includes different configurations: All 17.2mm in diameter; all beating at 21,600 bph; all with central seconds. Differences include the height (manual vs automatic) and jewel count.

• 741 – Manual-wind, no date (17 jewels, 3.3mm tall)
• 742 – Manual-wind, date at 3:00 (17 jewels, 3.3mm tall)
• 743 – Automatic, no date (21 jewels, 4.5mm tall)
• 744 – Automatic, date at 3:00 (21 jewels4.5mm tall)
• 745 – Automatic, no date (17 jewels)

Some parts may be interchangeable depending on the calibre, but double checking is required.

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