Grail Watch Reference
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Complications
24 Hour Hand
Chronograph
-2-Button
-Cam Switching Chronograph
-Column Wheel Chronograph
--6-Column Chronograph
-Horizontal Clutch Chronograph
Date
-Date by Pointer
-Quick Date Correction
-Retrograde Date
Day
-Day by Pointer
-Quick Day Correction
-Retrograde Day
GMT Hand
-Independently-Adjustable 12 Hour Hand
-Independently-Adjustable 24 Hour Hand
Hacking Seconds
Hand Winding
Modular
Month
Power Reserve Indicator
Hands
Date Pointer at 6:00
Brand
Landeron
Seiko
-Credor
-Seiko Instruments Inc.
--Time Module Inc.
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Regulators
ETACHRON
Indexed
Screw Regulator
Screwed Balance
Production Periods
1950s
2000s
2010s
2020s
Frequency
18,000 A/h
21,600 A/h
28,800 A/h
Anti-Shock
Diashock
Jewels
17
28
29
31
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 12:00
-Balance at 3:00
-Balance at 4:30
-Barrel at 12:00
Central Rotor
Column Wheel
-Column Wheel at 6:00
Landeron 10
Landeron 185
Landeron 56
Landeron 57
Landeron 59
Landeron 80
Seiko 4R57
Seiko 4S27
Seiko 4S36
Seiko 4S76
Seiko 4S77
Seiko 6R20
Seiko 6R21
Seiko 6R24
Seiko 6R27
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