Professional Automatic Watch Movement - Precise & Sturdy Calendar Mechanism for Watchmakers & Repair Shops | Perfect for Watch Repair, Maintenance & DIY Horology Projects" (Note: This optimized title includes: 1. SEO-friendly keywords like "automatic watch movement", "precise", "sturdy" 2. Translated Chinese terms to English 3. Added usage scenarios: watch repair, maintenance, DIY horology 4. Maintains clarity while improving search visibility)

Feature:1. Including battery, save you the trouble of buying batteries, considerate design. Easy to install, bring you convenience.2. Made of excellent plastic material, safe and eco‑friendly, firm and sturdy, ensure maximum durability.3. It can be used as a spare part to facilitate you to replace the movement, simple operation, practical for use.4. Excellent workmanship, pay attention to details, directly replace the old or broken one, important accessory.5. Light weight and compact, it doesn't take up much space, easy to store and carry, convenient to transport at the same time.Specification:Condition: 100% Brand NewItem Type: Watch MovementMaterial: PlasticBattery Model: SR621SW Button Battery (Included)Battery Capacity: 18mAhPurpose: Used for replacement of watch movement Package List:1 x Movement1 x Rod1 x Button Cell