Grail Watch Reference
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Complications
Chronograph
-2-Button
Date
-Big Date
--Double Wheel Big Date
Day/Night Indicator
GMT Hand
-Independently-Adjustable 12 Hour Hand
Modular
Hands
Hour Hand at 6:00
Brand
Soprod
Tianjin
-Sea-Gull
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Regulators
Soprod
Production Periods
2010s
2020s
Frequency
28,800 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
19
21
22
25
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 7:30
Central Rotor
Column Wheel
-Column Wheel at 6:00
Soprod C120
ST1901
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