Zenith 693

	Brand:	Zenith
	Family:	Zenith Elite
	Height:	3.94 mm
	Jewels:	26
	Reserve:	55 hours
	Frequency:	28,800 A/h
	Winding:	Automatic
	Diameter:	25.60 mm (11.5 ligne)
	Complications:	24 Hour Hand, Date, GMT Hand, Independently-Adjustable 24 Hour Hand
	Hands:	Central 24 Hour Hand, Central Hour Hand, Central Minute Hand, Small Seconds Hand at 9:00

Distinguishing Technical Characteristics
Clockwise Balance Cock Balance at 1:30 Barrel at 7:30 Central Rotor
Production: 2012 – 2017
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

Cal. 693 is a compact automatic movement with adjustable 24 hour hand from Zenith. It is closely related to Cal. 670 and Cal. 680.

The additional 24 hour hand is centrally located and is adjustable independently from the hour and minute hands. The hand is adjusted using a pusher at 10:00. This makes it ideal for GMT watches. Unusually, it features a small seconds subdial at 9:00.

Cal. 693 appears on the Zenith website in 2012 and is in the 2013 catalog. It last appears on the website in 2017.

Applications

Cal. 693 is used in a number of Zenith Pilot Type 20 GMT watches. The combination of a 24 hour hand and small seconds at 9:00 gives it a distinctive look.

Technical Aspects of the Zenith Elite Movement

The basic Elite movement measures 11.5 ligne (25.60 mm) diameter and most models are under 4 mm thick, despite a central automatic winding rotor and date complication. A few models used a larger main plate to move the date window outward or to support complications like a running 24 hour ring. The thinnest Elite movement is the hand-winding Cal. 650 at 2.83 mm and the thickest and most complicated is the large Cal. 687 at 6.20 mm.

Unusually, many Elite movements (apart from the 660 and 670 lines) feature small seconds at 9:00, a distinctive feature that differentiates the watches that use it. Some, however, feature central seconds, an adjustable 24 hour hand, a power reserve indicator, and other complications.

All Elite movements use an annular Glucydur balance wheel with a self-compensating balance spring and fine micrometer screw for adjustment. The automatic winding rotor is mounted on ball bearings like the ETA 2892 and originally included a tungsten carbide element for higher winding power. Most Elite movements boast 50 to 55 hours power reserve and all operate at 28,800 A/h.

Zenith Elite 680 and 690: Small Seconds

Cal. 680 was one of the original Elite movements introduced in 1994 and remains in production today. Most of its descendants feature small seconds at 9:00, though Cal. 690 lacks running seconds and the rare Cal. 689 relocates the subdial to 6:00.