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PARTS CATALOGUE / TECHNICAL GUIDE Cal. 4205B / 4206B / 4207B 4208B / 4225A / 4227A [SPECIFICATIONS] Cal. No. 4208B 4205B 4206B 4207B 4225A 4227A Item Movement The illustrations refer to Cal. 4206B (x 2.0) ø23.8 mm Outside diameter ø17.5 mm ø23.4 mm...
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PARTS CATALOGUE Cal. 4205B, 4206B, 4207B, 4208B, 4225A, 4227A Disassembling procedures Figs. : Ex.: Cal. 4206B Reassembling procedures Figs. : Lubricating: Type of oil Oil quantity Moebius A or AO-32 Liberal quantity SEIKO Watch Oil S-4 Normal quantity SEIKO Watch Oil S-6...
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PARTS CATALOGUE Cal. 4205B, 4206B, 4207B, 4208B, 4225A, 4227A 0012 485 Barrel and train wheel bridge screw (B) 0012 484 Barrel and train wheel bridge screw (A) 0396 420 Friction spring for second wheel pinion 0112 430 (Cal. 4205B, 4206B) 0112 432 (Cal.
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0012 484 0012 797 • C e n t e r w h e e l b r i d g e * Cal. 4205B has two more date dial guard screws screw instead of the day jumper screw. • Pallet cock screw •...
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Holding ring for dial * The type of holding ring for dial is determined based on the design of cases and dials. Check the case number and refer to “SEIKO Watch Parts Catalogue CD-ROM” to choose a corresponding holding ring for dial.
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0271 426 0224 422 60 Winding stem 0351 420 * The type of winding stem is determined based on the design of cases. Check the case number and refer to “SEIKO Watch Parts Catalogue CD-ROM” to choose a corresponding winding stem.
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TECHNICAL GUIDE Cal. 4205B, 4206B, 4207B, 4208B, 4225A, 4227A • The explanation here is only for the particular points of the calibres equipped with the day star with dial disk and date dial. 11 Date dial guard Set the protruding portion of the day-date corrector finger into the hole of the date dial guard (A portion).
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TECHNICAL GUIDE Cal. 4205B, 4206B, 4207B, 4208B, 4225A, 4227A 47 Locking seat for idle wheel • Lubricating Sliding crown wheel Locking seat for idle wheel 13 Date jumper spring 14 Date jumper 15 Day-date corrector finger 55 Yoke 56 Setting lever •...
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