Table of Contents
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PARTS CATALOGUE / TECHNICAL GUIDE
[SPECIFICATIONS]
Item
Movement
Movement size
Time indication
Vibrations per hour
Automatic winding
Additional
Auxiliary hand winding
mechanism
mechanism
Date calendar
Day and date calendar
Instant calendar (date)
setting device
Instant calendar (day
and date) setting device
Jewels
Cal. 4205B / 4206B / 4207B
4208B / 4225A / 4227A
Cal. No.
Outside diameter
ø17.5 mm
Casing diameter
ø17.2 mm
Height
5.6 mm
Three hands (Hour, minute and second hands)
21,600 (6 beats per second)
17 jewels
4208B
4205B
The illustrations refer to Cal. 4206B
21 jewels
4206B
4207B
17 jewels
21 jewels
4225A
4227A
(x 2.0)
ø23.8 mm
ø23.4 mm
5.6 mm
21 jewels
21 jewels
1
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Table of Contents
Related Manuals for Seiko 4206B
Summarization of Contents
Watch Movement Specifications
Movement Overview and Size
Details of the movement, including illustrations, overall diameter, casing diameter, and height.
Time Indication and Vibrations
Specifies the time display (e.g., three hands) and the movement's operational frequency (vibrations per hour).
Winding Mechanisms and Jewels
Lists winding mechanism types and the number of jewels for each calibre.
Parts Catalogue
Component Identification Diagrams
Exploded view diagrams illustrating watch components with numerical references for identification.
Lists of Screws and Jewels
Detailed lists of specific screws and jewels used in the movements, including part numbers and names.
Lists of Tubes and Other Parts
Catalogues of various tubes and miscellaneous parts, with remarks on specific items.
Component Combinations
Illustrations showing combinations of specific parts like wheels and pinions for different component types.
Technical Guide
Date Dial Guard and Pawl Lever Assembly
Instructions for assembling the date dial guard and engaging the pawl lever with the transmission wheel.
Transmission Wheel and Sliding Crown Wheel Spring
Guidance on lubricating the transmission wheel and setting the sliding crown wheel spring.
Locking Seat for Idle Wheel
Details on lubrication and setting position for the locking seat of the idle wheel.
Key Component Setting Positions
Diagrams illustrating the correct setting positions for components like date jumper, yoke, and setting lever.
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