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This is a genuine TMI/Seiko VX3J movement coil block, made in Japan, designed for the VX3J quartz caliber. It serves as the core drive component, converting electrical pulses from the circuit board into magnetic force to drive the stepper motor for hour, minute, and second hand timekeeping, along with date at 3H, 24-hour at 6H, and day at 9H complications. This product is brand new and original, intended for servicing and repair of VX3J movements.
Brand：TMI / Seiko Instruments Inc. (by Epson)
Compatible Movement：VX3J / VX3Je quartz caliber
Part Name：Coil Block
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Converts electrical pulses to magnetic force to drive stepper motor
1. Is this coil block an original TMI/Seiko genuine part?
Yes. It is an original TMI factory part, made in Japan.
2. Which movements is this coil block compatible with?
It fits the TMI/Seiko VX3J series quartz movements (10½ ligne, 23.30mm). This is a 3-hand multi-function movement featuring date at 3H, 24-hour at 6H, and day at 9H. Common variants include VX3Je and VX3JA. This coil block is interchangeable with Hattori V33J, Pulsar V33J, Bulova 6347.10 and other equivalent calibers.
3. What happens if the coil block is damaged?
The coil block is the core drive component of the stepper motor. Common symptoms include: movement not running after battery replacement, noticeable time gain/loss, or intermittent stoppage. The VX3J offers accuracy of ±20 seconds/month—coil failure directly impacts performance. Timely replacement is recommended.
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