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Complications
Date
-Quick Date Correction
-Semi-Instantaneous Date Change
Hacking Seconds
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Small Seconds Hand at 6:00
Brand
Chronoswiss
ETA
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
-Uni-Directional Automatic Winding
--Counter-Clockwise Automatic Winding
Regulators
ETACHRON
Production Periods
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
25
29
Balance Mount
Balance Cock
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 10:30
Central Rotor
Chronoswiss C.122 Family
Chronoswiss C.121
ETA 2681
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