| Brand | Seiko |
| Model | Bell-matic 4006-6021 |
| Year | 1975 |
| Caliber | Cal 4006A Case nr 520188 |
| Details | Size 39/1x/19 (w/h/lug) Alarm NOS… |
| Links | |
| Search | dba.dk / “Seiko 4006” |
What a beauty…
Adjust day/date on the Bellmatic
Pull the crown out to position two and you’re now in time-setting mode. Spinning the hands clockwise also advances the non-quickset day every 24 hours. Something a bit odd is the way you set the date: the alarm arming button at 2 o’clock serves a second purpose. Pushing it in actually advances the date one day at a time. The date also advances with the day every 24 hours while advancing the main hands through 12:00am. Once you’ve played around with it for a bit, the entire system actually becomes quite intuitive.