1976 Seiko Actus 6306-8020

Serviced (May 2022) 1976 Seiko Actus SS 21 jewels automatic watch

Model number 6306-8020

Case size 37mm without the crown x 41.5mm x 11mm

Lug width 18mm

Original stainless steel bracelet maximum circumference 19cm. Sized to 17.5cm

New mineral crystal

Case is in good condition. There are some small nicks but nothing too noticeable.

Backcase has some Japanese company logo engraving. It appears to given for 20 years of employment. 

Dial and hands are in beautiful condition.

Caliber 6306 was used in JDM models only (mostly in popular divers) and it is of higher quality than 6309, which was made for outside market.

It has hacking, quick set day / date and runs with good accuracy. Within 10 secs a day.