Seiko Grand Twin Sold Prices
The median sold price for Seiko Grand Twin is $350. Most sell between $269 and $430, based on 28 eBay sold listings.
Median Price
The middle price when all sales are sorted. Best represents what most buyers pay.
$350
Avg Price
The mean of the middle 80% of sold prices. Excludes outliers at both ends.
$338
Most Sell For
80% of sales fall within this range. Excludes outliers at both ends.
$269 – $430
10th–90th percentile
Total Sales
28
Price History
$396$225
$225
2026-03
2 sales
$269
2026-04
1 sales
$396
2026-05
7 sales
$343
2026-06
5 sales
$352
2026-07
4 sales
$395
2026-08
4 sales
2026-032026-08
| Month | Average price | Sales |
|---|---|---|
| 2026-03 | $225 | 2 |
| 2026-04 | $269 | 1 |
| 2026-05 | $396 | 7 |
| 2026-06 | $343 | 5 |
| 2026-07 | $352 | 4 |
| 2026-08 | $395 | 4 |
Price Distribution
<$270
2 sales
$270–$290
6 sales
$290–$320
3 sales
$320–$340
1 sales
$340–$360
7 sales
$360–$380
1 sales
$380–$410
3 sales
$410–$430
1 sales
>$430
4 sales
<$270$340–$360>$430
| Price range | Sales |
|---|---|
| <$270 | 2 |
| $270–$290 | 6 |
| $290–$320 | 3 |
| $320–$340 | 1 |
| $340–$360 | 7 |
| $360–$380 | 1 |
| $380–$410 | 3 |
| $410–$430 | 1 |
| >$430 | 4 |
Sales
Showing 1–25 of 28
Sort:
| Title | Brand | Model | Year | Price | Sold | |
|---|---|---|---|---|---|---|
![1979 [N MINT] Vintage SEIKO Grand Twin Quartz 9943-7000 35mm Silver Men's Watch](https://i.ebayimg.com/images/g/W0oAAeSwwrlqYsry/s-l140.webp){kind=small} | Seiko | Grand Twin | 1979 | $400 | Aug 11, 2026 | |
 | Seiko | Grand Twin | 1978 | $365 | Aug 3, 2026 | |
 | Seiko | Grand Twin | 1978 | $400 | Aug 3, 2026 | |
 | SEIKO Grand Quartz 9940-8010 Twin Quartz Gold Dial Watch Vintage 36.7mm Seiko · Grand Twin | Seiko | Grand Twin | — | $415 | Aug 1, 2026 |
![1978 [EXC+5] Vintage SEIKO Grand Twin Quartz 9943-8010 36mm Silver Men's Watch](https://i.ebayimg.com/images/g/SckAAeSwW3hqWJIO/s-l140.webp){kind=small} | Seiko | Grand Twin | 1978 | $300 | Jul 19, 2026 | |
![[N MINT] Vintage SEIKO Grand Twin Quartz 9943-8020 Day/Date Men's Watch Japan](https://i.ebayimg.com/images/g/S9cAAeSwG7dqR4kp/s-l140.webp){kind=small} | Seiko | Grand Twin | — | $430 | Jul 17, 2026 | |
![1979 [N MINT] Vintage SEIKO Grand Twin Quartz 9940-7000 35mm Silver QZ Men Watch](https://i.ebayimg.com/images/g/ZmMAAeSwM-RqThv3/s-l140.webp){kind=small} | Seiko | Grand Twin | 1979 | $400 | Jul 10, 2026 | |
 | Seiko | Grand Twin | — | $280 | Jul 4, 2026 | |
 | SEIKO Grand Quartz 9940-8000 Twin Quartz Men's Watch Vintage Seiko · Grand Twin | Seiko | Grand Twin | — | $310 | Jun 30, 2026 |
![Vintage 1978 [NEAR MINT] SEIKO Grand Twin Quartz 9940-8000 Silver Men's JAPAN](https://i.ebayimg.com/images/g/9lcAAeSwyBdpl-mT/s-l140.webp){kind=small} | Seiko | Grand Twin | 1978 | $360 | Jun 30, 2026 | |
 | SEIKO Grand Quartz 9940-8000 Twin Quartz Men's Watch Vintage 35mm Seiko · Grand Twin | Seiko | Grand Twin | — | $350 | Jun 22, 2026 |
![1978 [EXC+5] Vintage SEIKO Grand Twin Quartz 9940-8010 35mm Gold Dial Mens Watch](https://i.ebayimg.com/images/g/NjAAAeSwY3xqM3Kj/s-l140.webp){kind=small} | Seiko | Grand Twin | 1978 | $350 | Jun 20, 2026 | |
 | Seiko | Grand Twin | — | $345 | Jun 13, 2026 | |
![]Vintage 1978 Near MINT Seiko Grand Twin Quartz 9943-8020 Snow Flack Kanji Men's](https://i.ebayimg.com/images/g/kCUAAeSwNw1qEwij/s-l140.webp){kind=small} | Seiko | Grand Twin | 1978 | $550 | May 25, 2026 | |
![1978 [Near MINT] Vintage SEIKO Grand Twin Quartz 9940-8010 35mm Gold Men's Watch](https://i.ebayimg.com/images/g/nA8AAeSwBb1qAv0w/s-l140.webp){kind=small} | Seiko | Grand Twin | 1978 | $360 | May 21, 2026 | |
![Vintage 1979 [Exc+5 w/Box] SEIKO Grand Twin Quartz 9943-8010 Men's Watch JAPAN](https://i.ebayimg.com/images/g/yUcAAeSwjmBo8VW-/s-l140.webp){kind=small} | Seiko | Grand Twin | 1979 | $320 | May 19, 2026 | |
![[Near MINT] SEIKO Grand Twin Quartz 9943-8020 Gold Dial 36mm Men's Watch Vintage](https://i.ebayimg.com/images/g/AxQAAeSwsj1qDRw8/s-l140.webp){kind=small} | Seiko | Grand Twin | — | $460 | May 19, 2026 | |
![[WORKING] Vintage SEIKO Grand Quartz 9256-7000 Twin Quartz Dark Dial 1979 NEW BA](https://i.ebayimg.com/images/g/8WUAAeSwtRBpyTLY/s-l140.webp){kind=small} | Seiko | Grand Twin | 1979 | $285 | May 18, 2026 | |
 | Seiko | Grand Twin | 1979 | $350 | May 13, 2026 | |
![[N Mint in Box] Vintage SEIKO Grand Twin Quartz 9943-8020 Men's Watch From JAPAN](https://i.ebayimg.com/images/g/3PAAAeSwJyRp3GXZ/s-l140.webp){kind=small} | Seiko | Grand Twin | — | $450 | May 7, 2026 | |
 | Seiko | Grand Twin | 1981 | $269 | Apr 10, 2026 | |
 | Seiko | Grand Twin | 1978 | $200 | Mar 12, 2026 | |
![1988 [EXC+5] Vintage SEIKO Grand Twin Quartz 9942-5000 34mm Silver Men's Watch](https://i.ebayimg.com/images/g/PfAAAeSw59Npigym/s-l140.webp){kind=small} | Seiko | Grand Twin | 1988 | $250 | Mar 2, 2026 | |
![Vintage [ Exc+5 ] SEIKO Grand Twin Quartz 9943-5000 Kanji 35mm Men's Watch JAPAN](https://i.ebayimg.com/images/g/xDMAAeSwZDlpcGda/s-l140.webp){kind=small} | Seiko | Grand Twin | — | $270 | Feb 11, 2026 | |
 | Seiko | Grand Twin | — | $280 | Jan 30, 2026 |
Frequently Asked Questions
- How much is Seiko Grand Twin worth?
- The average sold price for Seiko Grand Twin is $338, with a median of $350. Prices range from $200 to $550 based on 28 eBay sold listings.
- What is the average price of Seiko Grand Twin?
- Seiko Grand Twin sells for an average of $338 on eBay. The median price is $350, which better represents typical sales by filtering out outliers.
- What is the most expensive Seiko Grand Twin ever sold?
- The highest recorded sale for Seiko Grand Twin on eBay is $550. The lowest sale is $200. Data is based on 28 completed eBay transactions.
Source: SoldPriceGuide (soldpriceguide.com) — eBay sold listing data, regularly updated. Last updated: August 2026.