SpecStudio
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Seiko SQ Quartz
Ref. 5Y23-8040
Stock unknown
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 colour
- Gold
Movement
- Caliber
- Seiko 5Y23
- Type
- Quartz
The market
Market prices.
RetailNot listed
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Retail stock & market context
Seiko on the secondhand market
+8.1%
2026 so far · +3.6% to +12.7% · 80 matched watches
In line with the index
Year-by-year readings →The connection engine
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The community take
Owners talk.
In a nutshell
The Seiko SQ Quartz (ref. 5Y23-8040) is a quartz watch, with a 36mm gold plated stainless steel case, 10.5mm thick, powered by the Seiko 5Y23 movement. under a acrylic crystal.
On real wrists
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The paper trail
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