Vanac was King Seiko in its most experimental phase.
Seiko introduced the line in the early 1970s, at the end of its great mechanical push. Grand Seiko and King Seiko had already proved what the company could do with precision, finishing, and movement development. Vanac took that credibility and gave it a sharper form.
The design was different from the rest of King Seiko. Angular cases. Integrated bracelets. Faceted crystals. Strong dial colours. Gold-toned markers. Day-date layouts. It belonged clearly to the 1970s, when Japanese industrial design was moving with more confidence and less restraint.
The movement kept it serious. References like the 5626-7240 used Seiko’s 5626 automatic calibre, a high-beat movement running at 28,800 beats per hour with hacking seconds and manual winding. The case was loud, but the engineering was still King Seiko.
The production window was short. Vanac appeared around 1972 and faded by the mid-1970s, just as quartz began reshaping the watch industry. That timing gives it a fixed place in Seiko history - the last stretch of high-grade mechanical ambition before the market changed.
Collectors look for Vanac because it has both sides of Seiko in one watch. Technical discipline underneath. Design risk on the outside. Good examples are harder to find with the original bracelet, clean dial, correct crystal, and sharp case lines intact.
The 5626-7240 carries that whole story clearly.
A short-run King Seiko. A high-beat mechanical movement. A 1970s case that could not have come from any other decade.
| Reference | 5626-7240 |
|---|---|
| Size | 37mm |
| Movement | Automatic |
| Brand | Seiko |
| Watch type | Dress / Formal / Office Integrated Bracelet Calendar |