SpecStudio
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Seiko SQ Quartz
Ref. 5Y23-8040
Stock unknown
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Case
- Diameter
- 36mm
- Thickness
- 10.5mm
- Lug-to-lug
- 42mm
- Lug width
- 18mm
- Material
- Gold Plated Stainless Steel
- Finish
- Gold
Crystal & dial
- Crystal
- Acrylic
- Dial color
- Gold
Movement
- Caliber
- Seiko 5Y23
- Type
- Quartz
Market
RetailNot listed
eBay listings
- Vintage Seiko Replacement Two Tone Watch Link For Band Bracelet 5Y23-8040 16mmPre-owned - Good · US$15
- Seiko Gold Plated Quartz SQ WatchPre-owned - Fair · GB$18
- Seiko SQ Watch Men 35mm Gold Dial Gold Tone Daydate Round 5Y23-8040 New BatterylPre-owned - Good · US$42
Lowest displayed prices first.
Matched listings from our latest checks; eBay may show additional results. We may earn a commission through these links at no extra cost to you.
Retail stock & market context
Seiko on the secondhand market
+10.1%
2026 so far · +5.2% to +17.0% · 103 matched watches
In line with the index
Year-by-year readings →Similar watches
Community
Owners widely praise the Seiko SQ Quartz for its excellent timekeeping, with one example running within 5 seconds a month. The 36mm case size is considered ideal, though the integrated bracelet can make it wear larger. Some owners note a perceived fragility and the need for a new crystal on their examples. One owner found the bracelet alone worth the $20 purchase price, while another criticized its cheap feel. Overall, owners value the Seiko SQ Quartz for its reliable quartz movement and comfortable wearability, with its price often reflecting sentimental value more than market worth.
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