Authentic Seiko 3650, a classic 34mm stainless steel men’s watch with a clean white dial, silver-tone finish, and a practical day-date window. This listing is for a used parts/repair donor and is being sold as-is. The case and crystal show scratches, and the movement is not functioning; the battery alone will not restore operation. Ideal for serious repairers, parts collectors, or donors seeking authentic Seiko components.

Why this Seiko 3650 parts watch stands out

Unlike generic salvage pieces, this Seiko 3650 carries genuine Japanese craftsmanship and a historically reliable design. Even as a non-working unit, it offers authentic donor parts that can help you restore or complete a Seiko 3650 project without guessing at compatibility. The 34mm case size, silver-tone stainless steel construction, and day-date feature give you a precise reference for matching parts to your existing Seiko collection or restoration donor pool.

Ideal use cases

• Restoration project: salvage the dial, hands, crown, crystal, or case for a compatible Seiko model.
• Parts donor: stock your workshop with authentic Seiko components to repair other Seiko 3650 models or similar references.
• vintage-seiko inspiration: use the white dial and non-numeric hour marks as a design reference for custom builds or homage pieces.

Key details at a glance

• Brand: Seiko
• Model: 3650
• Diameter: 34mm
• Case material: Stainless steel, silver-tone
• Dial: White with non-numeric hour marks
• Movement: Quartz
• Functions: Day-date
• Origin: Japan
• Condition: Used with scratches on case and crystal; non-working; will require repair. A new battery will not fix it.
• Part/Code: 5G23-6020 PARTS

What you’ll get

A single Seiko 3650 34mm case with its day-date dial component, suitable for parts salvage or as a donor for a restoration project. Please note: the watch is sold as-is for parts and repair, with no guarantee of operability after refurbishment.

Practical tips for maximum value

• Verify compatibility with your Seiko donor by matching the 34mm case size and the 5G23-6020 reference when planning repairs.
• If you’re a watchmaker or seasoned hobbyist, treat the piece as a complete donor source for spares such as the crown, case back, crystal, and dial.
• Use this piece as a learning reference for Seiko 3650 assembly and layout, especially if you’re cataloging vintage Seiko parts in your workshop.

We combine shipping. If you have questions, message us—we’re here to help you make the right choice for your restoration or parts collection.