In 1975, Seiko released the two lines that would continue their dominance in the Quartz Revolution for a decade until 1985, when these two product lines were retired. The King and Grand Quartz models from Seiko boasted extreme accuracy which was unheard of at the time of their release. The lowest end model, being the 48KQ, was rated to 10-15 seconds per month. While the highest Twin-Quartz crystal 97KQ model was rated to 20 seconds per year! 

The Grand Quartz line was similar to the King Quartz, but boasted even higher accuracy ratings and finishing quality. Their lowest end model running similarly to the KQ, the 48GQ was rated to 10-15 seconds per month, while the high end, twin-quartz model, the 99GQ was rated to just 10 seconds per year. 

This particular watch is the Seiko Grand Quartz 48GQ. Reference Number 4843-8100. Overall this watch is in (B) Very Good Condition. Some minor plating wear can be seen on the edges of the case as well as the bracelet. 

- Serial No./Year: 774454-/-1977
- Case:
    36mm diameter, 18mm lug width, 10.25mm thickness, 42.4mm Lug-to-lug.
    Gold Plated Steel
- Crystal: Hardlex
- Movement & Accuracy: 
    Caliber: Seiko Cal. 4843 Quartz
    Complications: Quickset Day/Date Indicator
    Stated Accuracy: 10-15 sec/month.
- Band: Original Seiko GQ Bracelet. Will Fit Wrists 5" to 7.5"
- Condition Rank: B, Very Good Condition. Please See photos.
- Country of Manufacture: Japan

Condition Rank Guide:
-N: Item is in New Old Stock condition (NOS). Shows little to no signs of wear apart from some minor handling wear.
-A: Item is in Excellent condition. Micro-scratches can be seen on the sides of the case, bezel, and/or bracelet. No pitting/gouges on the case or scratches in the crystal.
-B: Item is in Very Good condition. Minor scratches and scuffs can be seen on the sides of the case, bezel, and/or bracelet. No pitting/gouges on the case or deep scratches on the crystal.
-C: Item is in Good condition. Moderate scratches and scuffs can be seen on the sides of the case, bezel, and/or bracelet. Minor pitting/gouges may be visible on the case. One or less deep scratches may be visible on the crystal. See photos.
-D: Item is in Fair condition. Heavy scratches and scuffs can be seen on sides of the case, bezel, and bracelet. Significant pitting or gouges are visible on the sides of the case and the crystal shows multiple deep scratches
-F: Item is in Poor condition. Item is not functional. For parts or repair only.