ETA 2834-2

	Brand:	ETA
	Family:	ETA 2800 Family
	Height:	5.05 mm
	Jewels:	25
	Reserve:	42 hours
	Frequency:	28,800 A/h
	Winding:	Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding
	Diameter:	29.00 mm (13 ligne)
	Complications:	Date, Day, Hacking Seconds, Instant Date Change, Instant Day Change, Outer Day Wheel, Quick Date Correction
	Hands:	Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00, Day Window at 12:00

Distinguishing Technical Characteristics
Central-Rotor Automatic Clockwise Balance Cock Etachron Regulator Balance Balance at 12:00 Central Rotor
Production: 1982 – Current
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

ETA Cal. 2834-2 is an automatic movement with day and date wheels. Unusually, the day function uses an outer wheel, showing the complete name at 12:00 with the date shown at 3:00. This arrangement is often associated with the famous Rolex Day-Date “President” model, though that uses a different movement. The outer wheel required a larger 13 ligne main plate.

Cal. 2834-2 is part of the standard “Mecaline” line at ETA and is still produced as of 2019. It replaced Cal. 2834-1 in 1982.

Sellita sells a similar movement, Cal. SW240-1, though it has 26 jewels instead of 25.

Current ETA 2800 Family

The ETA 2800 family currently consists of six movements in production since 1982. They are compact but not particularly slim automatic movements operating at 28,800 A/h. The basic Cal. 2824-2 and 2836-2 are among the most widely-used movements in modern Swiss watches. Although over 5 dozen different movements in this series have been produced, just six are available today. Due to restrictions from Swiss COMCO regulations, ETA is unable to sell movements outside the Swatch Group since 2020. This has forced many watch makers to turn to the similar Sellita SW200 series of movements.

Calibres 2801-2, 2824-2, and 2826-2 are officially listed as “phased out” by ETA after 2021, leaving just Calibres 2804-2, 2834-2, and 2836-2 available for sale. This is in keeping with ETA’s focus on proprietary movements for Swatch group companies rather than outside customers.

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