Seiko Grand Quartz 4843-8100

Seiko Grand Quartz 4843-8100Brand Seiko Model Grand Quartz Reference 4843 8100 Year 1977 June Movement Quartz Extras New battery (November 2025) New battery hatch gasket Dial Diamond Dust Snowflake Jewels 7 Case 36mm Lugs 18mm Day date Day and date Crystal Sapphire Strap Fits up to an 18,5 cm wrist Performance 5 seconds per month Box&papers Not included Condition Very good The watch This exact reference was one of the very first watches we sold after our launch, and were pleased

The watch
This exact reference was one of the very first watches we sold after our launch, and we’re pleased to have another example back in the collection. The case shows light signs of wear consistent with age, but the dial is in mint condition and the original sapphire crystal remains scratch-free. The day display can be set to either Japanese Kanji or English.

The bracelet didn’t originally come with this model, but it’s from the same era and suits the watch perfectly, featuring two polished center links that complement the case design.

Additional information
The case is made of hardened stainless steel, giving it a specific type of finish and extra resistance against scratches.

The 4843 movement was developed by Seiko’s Suwa division, introduced in 1974 along with the King Quartz 4823 and the higher-end 4883 superior. Its accuracy is rated at ± 5 seconds per month, which were phenomenal specs for the 70’s.

The quartz crisis
The "quartz crisis" was a major turning point in the watch industry during the 1970s and 1980s, driven by the rise of quartz technology. Companies like Seiko led the way, offering watches that were more accurate, more affordable, and easier to maintain than traditional mechanical models.

With the launch of the first quartz wristwatch, the Astron, in 1969, Seiko showed the world what quartz could achieve. Swiss watchmakers, known for their mechanical craftsmanship, were slow to react and lost much of their market share. The crisis forced the Swiss industry to restructure and helped shape a future where traditional watchmaking and modern quartz innovation could exist side by side.