Seiko 4205B User Manual

1
PARTS CATALOGUE / TECHNICAL GUIDE
Cal. 4205B / 4206B / 4207B
4208B / 4225A / 4227A
Movement
Time indication
Outside diameter ø17.5 mm
Casing diameterMovement size ø17.2 mm
Height
5.6 mm
Three hands (Hour, minute and second hands)
Vibrations per hour 21,600 (6 beats per second)
Additional
mechanism
Automatic winding
Jewels 17 jewels
21 jewels
The illustrations refer to Cal. 4206B (x 2.0)
4227A4207B4205B
Cal. No.
Item
[SPECIFICATIONS]
Date calendar
Day and date calendar
Instant calendar (date)
setting device
Instant calendar (day
and date) setting device
4206B
4225A
4208B
ø23.8 mm
ø23.4 mm
5.6 mm
Auxiliary hand winding
mechanism
17 jewels 21 jewels 21 jewels 21 jewels

Seiko 4205B Specifications

General

Brand	Seiko
Model	4205B
Category	Watch
Language	English

Summary

Parts Catalogue

Specifications Overview

Details of movement size, time indication, vibrations, and mechanisms.

Disassembly, Reassembly, and Lubrication Procedures

Guides on disassembly, reassembly, and lubrication of watch components.

Illustrated Parts Identification

Diagrams illustrating watch components with reference numbers for identification.

List of Screws

Comprehensive list detailing various screws used within the calibres.

List of Jewels

Comprehensive list detailing the jewels utilized in the watch movements.

List of Tubes

Detailed compilation of all tubes employed in the watch mechanism.

Other Parts and Remarks

Lists miscellaneous components and provides important notes for specific parts.

Component Combinations and Winding Stem

Details on component combinations and information on winding stem selection.

Technical Guide

Specific Component Technical Explanations

Detailed explanations for specific components like dial guard, pawl lever, and transmission wheel.

Setting and Lubrication Details

Guidance on locking seat for idle wheel and proper setting positions for components.