
Seiko KS 5626-7040 Chronometer 1970-1971
In the late 60’s, early 70’s, some King Seiko had the “Chronometer Officially Certified” or “Superior Chronometer Officially Certified” mention on their dials. The 5625, 5626, 5245 and 5246 movements were concerned. After a quite short period, the swiss watchmaking industry took measures to prevent non-swiss movements to be “Chronometer” certified, only the COSC could […]