The case for quartz.

Published 13 September 2026 · WHV · Public-source editorial note

A black dial, steel bracelet and a case just 37 millimetres across. The Grand Seiko SBGX261 does not need much explanation from across a room. Look at its specification, though, and one detail changes the conversation: the maker rates its 9F62 quartz movement to within ten seconds a year. A battery is not an apology here. It is part of the design decision.

The work you do not see

Grand Seiko introduced the 9F family in 1993. Its technical account describes quartz crystals stabilised over three months and paired with individually programmed circuits. Temperature is sampled 540 times a day so the movement can compensate for its effect on timekeeping. There is also a service adjustment for fine-tuning the rate.

Other details concern the ordinary act of looking at a watch. Two rapid motor pulses provide the torque for substantial hands, while a small spring controls the play that can make a seconds hand tremble. A protective construction keeps dust away from the gear train during battery changes. These are the manufacturer’s explanations of the mechanism, not WHV laboratory measurements.

A watch to keep wearing

What holds value here is a useful reversal of expectations. Instead of asking whether quartz is prestigious enough, ask whether the object does its job exceptionally well and whether you still want to wear it. Precision, clear reading and proportions that suit the wrist can matter every morning. None requires a queue outside a boutique.

For a used example, establish the reference, condition, service route and full purchase cost. For a new one, try the size and bracelet before deciding. Engineering quality is a reason to look closely. It is not evidence that a watch will retain its purchase price.

Source and context.

Grand Seiko: SBGX261 specifications ↗

Grand Seiko: the engineering of Caliber 9F ↗

Source-led examination of the SBGX261 and its movement family. WHV has not tested accuracy, inspected a watch or assessed resale prices. Battery replacement and servicing remain part of ownership.

Source checked 13 September 2026. WHV interpretation is distinct from the source’s account.