The key collector detail is the movement: the Caliber 4842. This quartz engine was built by the Suwa Seikosha factory and was designed to be accurate to an incredible ±5 seconds per month! It achieves this through a high-frequency crystal and rigorous quality control. The ultimate sign of its prestige is the applied "twin quartz" logo on the dial two stylized tuning forks symbolizing the use of advanced quartz technology for stable timekeeping, a marker reserved exclusively for this elite series.
Aesthetically, the watch is a beautiful product of its time. The gold-plated case and the striking vertical linen-textured silver dial provide incredible depth and visual warmth. The case has a refined cushion shape, and the dial features a simple date window for clean, formal aesthetics. This Grand Quartz offers superior accuracy and unmatched vintage luxury a crucial piece of the Seiko story!
| Brand: | Seiko |
| Model: | Grand Quartz |
| Reference: | 4842-5100 |
| Year: | 1977 JDM (Serial 7D0139) |
| Movement: | High Accuracy Quartz (HAQ) Caliber 4842 |
| Case Material: | Gold-Plated Case / Stainless Steel Back |
| Case Diameter: | Approx. 35mm (excluding crown) |
| Case Thickness: | Approx. 10mm |
| Lug Width: | 20mm |
| Dial: | Original Vertical Linen-Textured Silver Dial |
| Strap: | Stainless Steel Mesh Bracelet |
This watch is in excellent vintage condition. The movement has had a new battery installed and is functioning correctly, keeping exceptionally accurate time as expected. The case and bracelet show minor signs of wear consistent with age. The beautiful textured dial is in mint condition. Please study the high-resolution photos carefully, as they are a key part of the item's description.
At Veteran Times, we are collectors first. We believe that buying a vintage watch should be a transparent, trustworthy, and exciting experience. Every timepiece we offer is rigorously inspected for authenticity and function. We are passionate about horological history and are committed to preserving these beautiful machines. This watch is guaranteed authentic and sold with the confidence that comes from dealing with dedicated specialists.