BRAND:	ETA
	FAMILY:	ETA Flatline 2890 Family
	HEIGHT:	4.10 mm
	JEWELS:	21
	RESERVE:	42, 50 hours
	FREQUENCY:	28,800 A/h
	WINDING:	Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding
	DIAMETER:	25.60 mm (11.5 ligne)
© ETA ETA 2893-2	COMPLICATIONS:	24 Hour Hand, Date, GMT Hand, Hacking Seconds, Independently-Adjustable 24 Hour Hand, Quick Date Correction, Semi-Instantaneous Date Change
	HANDS:	Central 24 Hour Hand, Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00

DISTINGUISHING TECHNICAL CHARACTERISTICS
Central-Rotor Automatic Clockwise Balance Cock Etachron Regulator Balance, Balance at 12:00
PRODUCTION: 1992 – CURRENT
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

ETA’s 2893-2 is a modular GMT movement with central seconds and date. It is derived from the similar ETA 2892-2 and is part of the third-generation ETA 2890 family. Cal. 2893-2 was used in 1995 in the Ikepod Seaslug. It appeared in 1992, alongside the similar ETA 2893-1 and ETA 2893-3. It remains in production today.

ETA 2893 Movements

ETA released a trio of dual time zone movements in 1992, all known as Cal. 2893. Each movement has a slightly different implementation of a 24 hour second time zone display.

In all three movements, the central 24 hour display is quick-set using the crown in second position and is independent of the central hour hand, which is set using the crown in third position. Adjusting the 24 hour hand or disc does not cause the movement to “hack” or stop, so the timekeeping remains accurate when traveling. Although common today, an independent 24 hour hand like this was somewhat unusual at the time. Indeed, the popular Rolex GMT-Master II Ref. 16710 had just gained an independently-adjustable 24 hour hand four years earlier.

The GMT feature and date wheel are adjusted with the crown in position 1. Turning it clockwise advances the GMT hour hand in 1 hour increments, while turning it counter-clockwise advances the date wheel.

Sellita’s Cal. SW330-1 is a clone of ETA’s 2893-2 but has 25 jewels rather than 21.

ETA 2893-2 Applications

Cal. 2893-2 is perhaps the most common of the ETA 2893 sub-family, powering many higher-end GMT watches:

• 1995 Ikepod Seaslug
• Breitling Windrider Antares World
• 2000 Panerai Luminor GMT
• 2002 Magellan 1521
• 2002 Glycine Airman 7
• Glycine Airman SST 06
• 2003 Ball Engineer GMT
• Ball Engineer Master II Aviator GMT
• 2004 Sinn Pilot’s 856
• Sinn U2/EZM 5
• Sinn 6036
• Sinn 857
• 2005 Linde Werdelin Biformeter
• Linde Werdelin Two Timer
• 2006 Baume & Mercier Hampton Classic Carée XL GMT
• 2007 Raymond Weil GMT
• Hamilton Khaki Navy Air Race
• 2011 David Yurman GMT Classic

The IWC 30710 is a refinished ETA 2893-2, as is TAG Heuer Calibre 7 GMT.

ETA 2890 Family Overview

The ETA 2890 family is a series of slim and robust automatic watch movements produced by ETA. They are generally regarded as superior to the similar ETA 2800 family. Cal. 2890 and its successors is based on the Eterna 1466U, with ball bearings on the rotor and a smaller balance wheel in the modern style. Launched in 1975, the family remains one of the leading watch movements to this day.

The most well-known movement in this series today is Cal. 2892A2, a highly evolved automatic movement with central seconds and a date wheel. Because of its slim dimensions, Cal. 2892A2 is often paired with modules to add world time, power reserve indicator, chronograph, and other complications.

Distinguishing features of the ETA 2890 family include a smaller balance wheel than historic movements, including the ETA 2824 family, and a large rotor hub located with seven visible bearings. The balance is located at 12:00 when viewed from the back with the crown at 9:00, and is located by a clockwise cock with an eccentric screw for regulation.

Most members of the modern 2890 family are available in there finish levels:

• Elaboré – with nickel balance
• Top – with Glucydur balance
• Chronomètre – with Glucydur balance and official chronometer certification

ETA also sells these movements with gold plating, various finishes, and custom rotors.

ETA 2890 Family

Most current ETA 2890 family movements have been updated since the 1990s with improved winding efficiency and an extra jewel in the upper winding bridge. As of 2020, ETA is no longer supplying these movements outside the Swatch Group, with most buyers switching to the clone SW300 family from Sellita. Specifically, Cal. SW300-1 replaces ETA’s 2892A2, Cal. SW330-1 replaces ETA’s GMT 2893-1, and Cal. SW360-1 replaces ETA’s small seconds 2895-2.