TMI Seiko VK64

Meca-Quartz Chronograph
A hybrid movement that combines the accuracy of quartz with the feel of a mechanical chronograph. The VK64 features a sweeping chronograph seconds hand, instant snap-back reset, 24-hour subdial, and date display, making it ideal for vintage and modern chronograph watches.

TMI Seiko VK64 Movement Manual

The TMI VK64 is a premium Meca-Quartz chronograph movement developed by TMI (Time Module Inc., part of the Seiko Group). Unlike traditional quartz chronographs, the VK64 uses a mechanical chronograph module, delivering crisp pusher feedback, a smooth sweeping chronograph hand, and an instant fly-back reset while maintaining the accuracy and low maintenance of quartz.

Specifications

Specification

Details

Manufacturer

TMI (Seiko Group)

Caliber

VK64

Movement Type

Meca-Quartz Chronograph

Functions

Hours, Minutes, Chronograph Seconds, 60-Minute Chronograph, 24-Hour Indicator, Date

Jewels

0 Jewels

Accuracy

±20 seconds per month

Battery

SR936SW Silver Oxide

Battery Life

Approx. 3 Years

Diameter

29.00 mm

Height

5.10 mm

Hacking Seconds

Yes (Time Setting)

Country of Origin

Japan

Operating Instructions

Setting the Time

  1. Pull the crown to the second click.

  2. Turn the crown until the correct time is displayed.

  3. Push the crown back to the normal position.

Setting the Date

  1. Pull the crown to the first click.

  2. Turn the crown to set the correct date.

  3. Push the crown back once finished.

Important: Do not change the date between 9:00 PM and 3:00 AM, as the calendar mechanism may be engaged.

Using the Chronograph

Starting the Chronograph

  • Press the top pusher (2 o'clock) to start timing.

Stopping the Chronograph

  • Press the top pusher again to stop.

Resetting

  • After stopping the chronograph, press the bottom pusher (4 o'clock).

  • The chronograph hands instantly return to 12 o'clock, just like a traditional mechanical chronograph.

Care & Maintenance

  • Replace the battery approximately every 3 years.

  • Avoid exposing the watch to strong magnetic fields and severe impacts.

  • Keep the crown fully pushed in (or screwed down if applicable).

  • Although quartz movements require less maintenance than automatic movements, periodic servicing is recommended to maintain water resistance and overall performance.

Why Choose the VK64?

  • Premium Japanese Meca-Quartz movement

  • Quartz precision with mechanical chronograph feel

  • Smooth sweeping chronograph seconds hand

  • Instant snap-back chronograph reset

  • Crisp mechanical pusher action

  • 24-hour indicator and date display

  • Approximately 3-year battery life

  • Highly reliable and low maintenance

The VK64 is an excellent choice for enthusiasts who appreciate the appearance and operation of a mechanical chronograph while enjoying the accuracy and convenience of quartz technology.