Seiko Solar 557 – Rectangular hand-wound watch in 20-micron gold plating (September 1959)

Elegant Seiko Solar ladies' wristwatch with classic rectangular case and fine gold-colored indices.
The Model 557 dates from the late 1950s to the early 1960s and belongs to the early Seiko Solar series, which was known for its slim design and precise hand-wound movements.
The case is coated with a high-quality 20-micron gold plating (EGP 20 microns) , which indicates a significantly more durable gold layer than the later common 10-micron cases.

Technical features

• Model: Seiko Solar 557
• Caliber: Hand-wound movement, 17 jewels
• Serial number: 99xxxxx (Date of manufacture September 1959)
• Functions: Hour, Minute
• Movement: Mechanical Seiko hand-wound movement from the 1950s series
• Housing: EGP (Electro Gold Plated) 20 Microns
• Dial: Silver-colored with applied gold-colored indices
• Hands: Gold-colored, faceted
• Glass: Acrylic glass
• Case size: 14.7 × 24 mm
• Height: 7.9 mm
• Lug width: 9 mm
• Lug-to-lug: 30.8 mm
• Bracelet: Elegant brown crocodile leather strap
• Weight: 10 g (including leather strap)

Condition

Very nice vintage condition with slight signs of wear, appropriate for its age.
The dial shows a subtle, even patina.

The gold plating is well preserved, and the movement starts smoothly. The crown is slightly loose in its original state, but this does not affect its functionality.
The leather strap is new and of high quality.

Special features

• Rare early Seiko Solar from the hand-wound era (not solar-powered – “Solar” was a model line here)
• 20-micron gold plating – exceptional for its time
• Elegant rectangular case shape with classic lines
• Collectible vintage Japanese ladies' dress watch from the 1950s

Warranty (used)

This is a used item. The limitation period for claims based on defects (statutory warranty) is 12 months from delivery.

Notice

Since this is a used watch, water resistance cannot be guaranteed.
To protect the clock mechanism, the clock should not come into contact with water or moisture.