Mechanical watches

Grand Seiko Mechanical covers the Grand Seiko watches built on the 9S mechanical calibres, alongside a few Seiko models: the Alpinist, the Cocktail Time and the SKX divers. The first Grand Seiko appeared in December 1960, and Seiko has presented Grand Seiko as an entirely separate brand since 2017. The modern 9S family began with the 9S55 in 1998 and includes hand-wound calibres such as the 9S64 and automatics such as the 9S65. Mechanical 9S watches are made by Morioka Seiko Instruments at the Grand Seiko Studio Shizukuishi in Iwate Prefecture, which opened in 2020.

Several names refer to movement milestones. The 9S85 of 2009 restored the 36,000 vibrations per hour of some late-1960s Grand Seiko movements; it and the GMT 9S86 power the Hi-Beat 36000 models. The 9S86 arrived in 2014, the year a Hi-Beat 36000 GMT won the Petite Aiguille prize at the GPHG. The 9SA5 of 2020 began a redesigned generation, with a dual impulse escapement, a free-sprung balance and an 80-hour power reserve. The 62GS edition SBGH261 takes its name from the first automatic Grand Seiko, which the brand dates to 1967.

The SBGR models are the automatic date watches on the 9S65, the SBGH Hi-Beats run on the 9S85, and the SBGJ adds a GMT hand on the 9S86. Cases come in steel, titanium, gold and platinum. The titanium Professional 600 m Diver, SBGH255 and the blue-dial SBGH257 limited to 500, is a far bigger watch, at 46.9 mm across and 17 mm thick. The SBGW263, 20 pieces in platinum from the Elegance Collection, is hand-wound on the 9S64, and the SLGH002 Heritage 60th Anniversary, 100 pieces in yellow gold, carries the new 9SA5. The SBGJ021 Dawn of Mt. Iwate is a red-dial GMT limited to 500.

From Seiko come the green-dial Alpinist SARB017, the 38.4 mm SARB033 and SARB035, the Cocktail Time SARB065 with a Hardlex crystal, and the SKX007 and SKX009 divers: 42 mm, with mineral crystals and rotating dive bezels.