Family: 255x17/23 jewels42h power reserve21,600 vph (6 Hz)
ETA 2550 mechanical automatic movement with flat hairspring, sweep seconds, oscillating weight, and pawl winding system. The cal. 2551 variant adds a date (quantième) complication.
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Jewel Count
17/23 jewels
Power Reserve
42h
Frequency
21,600 vph (6 Hz)
Diameter
17.2mm
Height
4.5mm
Display Type
Analog
COMPLICATIONS
Date
FEATURES
Sweep Seconds
QUICK FACTS
BRAND
TYPE
AutomaticSTATUS
DiscontinuedMANUFACTURE
In-houseCALIBER FAMILY
255xCOUNTRY
SwitzerlandALSO KNOWN AS
eta 2550