|Winding:||Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding|
|Diameter:||25.60 mm (11.5 ligne)|
|Complications:||Big Date, Date, Double Concentric Wheel Big Date, Hacking Seconds, Quick Date Correction|
|Hands:||Big Date at 3:00, Central Hour Hand, Central Minute Hand, Central Seconds Hand|
|Distinguishing Technical Characteristics|
Clockwise Balance Cock
|Production: 2004 – Current|
ETA’s 2896 is a modular movement with “big date”. It is derived from the similar ETA 2892A2 and is part of the third-generation ETA 2890 family. Cal. 2896 appeared in 2004, alongside ETA 2897, and remains in production today.
Unlike many other “big date” movements, Cal. 2896 uses two concentric overlapping discs to display the date at 3:00.
The IWC 30130 is a refinished ETA 2896.
Seiko 4R Family Overview
Introduced in 2008, the Seiko Instruments Inc. (SII) 4R family is a mainstream automatic watch movement used in many Seiko models and offered to third parties by Time Module Inc. (TMI). It is an evolution of the Seiko 7S family of movements, produced since 1996, and is related to the higher-end Seiko 6R family.
All movements in the 4R family operate at 21,600 A/h and measure 12 ligne (27.4 mm) in diameter by 5.32 mm in height. Cal. 4R15 and 4R16 have 22 jewels, Cal. 4R35A has 23 jewels, and all other 4R and NH movements have 24 jewels. The NH series movements sold by Time Module Inc. (TMI) are rated as slightly more accurate from the factory, at -20/+40 rather than -35/+45 for the Seiko branded movements, and some differ in the finish, number of jewels, and rated power reserve.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.