Item Description
It's a Vintage SEIKO BELL-MATIC WEEKDATER.
It's in Very Good used condition.
It's in Very Good used condition.
- Movement :
- Caliber : 4006A 27 Jewels.
- Movement : Mechanical (Automatic).
- Year of manufacture : 1971.
- Externals :
- Serial number : 112507.
- Glass : Acrylic.
- Case Size : Approximate Width-38.2mm.
- Lug Width : 19mm.
- Band : New Leather Strap.
- Wrist size that can be worn : Up to about 190mm.
- This watch does not come with the box and instruction manual. The watch itself will be delivered.
- The Bell-Matic has two mainsprings: one for powering the watch and one for ringing the bell.The mainspring for powering the watch is wound by shaking the watch.The mainspring for ringing the bell is wound by winding the crown while the button at the 2 o'clock position is not pulled out.
- Condition :
- Used, it runs well.
- To ensure stable timekeeping, key components were serviced (cleaned and lubricated) in June 2026.
- This watch has been carefully checked and adjusted, and will be delivered ready to use with confidence.
- The day difference time is less than +-1 minute / day.
- Quick set Date : Okay. Push the button at the 2 o'clock position.
- Quick set Day : Move the hands back and forth between 10 PM and 1 AM. This is the original specification.
- The bell rings properly, though its timing may vary by a few minutes. Please consider this acceptable for a vintage watch.

