Seiko 2505B, 21 jewels

For this calibre we acknowledge the following parts as a base:

205... Barrel (drum and cover) 

213... Barrel arbor

224... Center wheel with cannon pinion

232... Third wheel

241... Fourth wheel, second wheel

225... Cannon pinion

245 Cannon pinion for sweep second wheel

271... Hour wheel

261... Minute wheel

275 Sweep second pinion

301 Regulator for flat hairspring

307 Regulator for breguet hairspring

351... Stem

404 Stem male/female

282... Clutch wheel

283... Winding pinion

285... Ratched wheel

284... Crown wheel

481... Crown wheel ring

423 Crown wheel core, upper

381.. Click

382... Click spring

434 Clicking spring

384... Yoke

437 Rocking bar

385... Yoke spring

383... Setting lever

386... Setting lever spring

453 Intermediate setting wheel

462 Minute work cock

704 Escape wheel for lower endpiece

251... Escape wheel  

301...Juwelled pallet fork

711 Pallet with lower endstone

310... Balance complete

315... Balance staff

728 Balance staff

331...Plateau

401... Mainspring

790... Pin escape wheel

792... Balance staff

797... Pin pallet fork for roller

798... Finger

800... Pin pallet fork for finger

500... Oscillating Weight

511... First reduction Wheel

514... Second reduction Wheel

530... Friction Spring for Intermediate pinion

542... Rocking seat for idle wheel

546... First reduction wheel click guard

551... First reduction wheel click

553... Click spring for first reduction wheel

860... Intermediate pinion for Ratchet wheel

556... Date finger

801... Date Dial

802... Date driving wheel

808... Date dial guard

810... Date jumper

811... Date jumper spring

817... Intermediate date wheel

880... Date Corrector

881...Date corrector lever

883... Date corrector spring

If the part you need it not available or listed, do not hesitate to contact us.