Seiko 2919A - Parts List
Seiko 2919A – Technical Guide (High Quality)
The Seiko 2919A is a vintage mechanical hand-wound movement introduced in the 1970s, built specifically for ladies’ wristwatches. Part of the 29xx movement series, the 2919A is compact, reliable, and includes a central seconds hand—a feature not always found in small-caliber women's watches of the era. It reflects Seiko’s commitment to precision engineering in miniature formats, offering durable construction and straightforward serviceability in a time-only configuration.
1. Technical Specifications
| Specification | Details |
|---|---|
| Caliber Number | Seiko 2919A |
| Movement Type | Mechanical – Hand-winding |
| Functions | Hour, Minute, Central Seconds |
| Jewels | 17 |
| Beat Rate | 21,600 vibrations/hour (6 beats/second) |
| Power Reserve | ~40 hours |
| Manual Winding | Yes |
| Automatic Winding | No |
| Hacking Seconds | No |
| Calendar | None |
| Movement Diameter | ~17 mm (~7¾ lignes) |
| Movement Height | ~3.2 mm |
| Shock Protection | Diashock (on balance staff) |
2. Key Features
-
Classic three-hand layout: Hour, minute, and central seconds
-
Manual winding only – no automatic rotor, simplifying design
-
No calendar for a clean, symmetrical dial
-
Diashock protection on the balance pivots for shock resistance
-
Compact dimensions make it ideal for small-diameter watch cases
-
Durable 17-jewel construction reduces wear and enhances longevity
The 2919A stands out as a clean, reliable time-only movement tailored for elegant watches without extra complications.
3. Operation Instructions
Winding the Watch:
-
Wind the crown clockwise (15–20 turns fully winds the mainspring).
-
The watch should run for approximately 40 hours when fully wound.
Setting the Time:
-
Pull the crown out to its single position.
-
Rotate crown to adjust the hour and minute hands.
-
Second hand continues running during time setting (no hacking).
4. Movement Construction
Dial Side:
-
Cannon pinion, hour and minute wheels
-
Setting system: clutch wheel, stem, yoke, and sliding pinion
-
No calendar mechanism – simplifies servicing and reduces thickness
Train Side:
-
Mainspring barrel with ratchet and crown wheel
-
Center, third, fourth, and escape wheels
-
Pallet fork and balance wheel
-
Balance bridge with Diashock system
-
Fine regulator for adjusting accuracy
The movement is slim and modular, allowing for efficient assembly and repair.
5. Servicing Guidelines
Recommended Interval:
-
Every 4–6 years depending on use and environment
Service Procedure:
-
Fully disassemble movement
-
Clean components in a professional ultrasonic machine
-
Inspect jewels, pivots, mainspring, and teeth for wear
-
Lubricate precisely:
-
Train wheel pivots
-
Pallet stones and escape wheel
-
Barrel arbor and crown gear contact
-
Cap jewels on the balance staff
-
-
Reassemble and regulate using a timing machine
Download
If you don't see the PDF file click on this link »
