ETA 2890-9

	Brand:	ETA
	Family:	ETA Flatline 2890 Family
	Height:	5.2 mm
	Jewels:	21
	Reserve:	42 hours
	Frequency:	28,800 A/h
	Winding:	Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding
	Diameter:	(11.5 ligne)
	Complications:	Date, Day, Leap Year, Month, Moon Phase, Quick Date Correction, Quick Day Correction, Quick Month Correction, Year
	Hands:	Central Hour Hand, Central Minute Hand, Date Pointer at 12:00, Day Pointer at 3:00, Month Pointer at 9:00, Moon Phase Wheel at 6:00, Year Wheel at 9:00

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

ETA’s 2890-9 is a modular perpetual calendar movement produced from 1990 to 2000. It is based on the ETA 2892-2, part of the second generation of the ETA 2890 family. The replacement, ETA 2890A9, based on the updated ETA 2892A2, was introduced in 1998.

The ETA 2890-9 paired a perpetual calendar and moon phase module with the ETA 2892-2 base. This increased thickness from 3.6 mm to 5.2 mm. Unlike the similar 2891-9, this movement lacks a seconds hand.

The perpetual calendar layout is as follows:

• Central hour and minute hands
• Day pointer at 3:00 (set by pusher at 1:30)
• Month pointer at 9:00 (set by pusher at 8:00)
• Moon phase wheel at 9:00 (set by pusher at 4:30)
• Year/leap year wheel at 9:00 (set with month pusher)
• Date pointer at 12:00 (set by pusher at 10:30)

ETA 2890-9 Applications

Cal. 2890-9 was rarely used, appearing as mechanical watches were just regaining prominence and being a fairly expensive movement.

• Movado Perpetual Calendar

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 2021, 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.

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