This men’s Grand Seiko has the automatic, hi-beat movement with date. Model reference 5645-7010 or 56GAC
HOW DO WE DATE THIS WATCH?
From the serial number on the case back we can accurately date this watch to being made in September 1971.
CONDITION
The Grand Seiko story starts in 1960, and by the end of that decade they were so accurate that they not only dominated the Neuchatel Observatory competition, they actually stopped running the competition in 1969. However by 1975 Seiko were no longer producing Grand Quartz mechanical watches, as the demand for their Grand Quartz ranges made the mechanical watches obsolete. There would not be another mechanical Grand Seiko until 1998. So this reference 5645-7010 is a slightly weird choice in 1971 – Seiko were already marketing quartz watches that would rival the accuracy of the GS, and the GS would cost about two months wages in Japan, which was the only place you could buy a Grand Seiko. One excellent thing about this reference is is came on a leather strap, and the bracelet watches are generally only for very small wrists. The leather strap is new, and could be swapped for a different colour if preferred. This example also retains the gold medallion in the centre of the case back – this gold medallion can be missing on some watches. The original dial is clean and the glass scratch and chip free. The watch has the original GS crown still too. The case is unpolished, and shows signs of wear as it is entitled to after 50 years. The 25 jewel automatic movement was adjusted to five positions and temperatures, and has quick set date and hacking. This is very fine horology and it is no wonder than Grand Seiko’s are one of the most sought after vintage watches currently.
This watch will be supplied with our branded presentation box and our Certificate of Authenticity.
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SIZE
Width with crown 37.5 mm
Width without crown 36.5 mm
Between lugs 18 mm
Lug to lug length 40.9 mm
Case Thickness 10.3 mm
All sizes are approximate.
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