Casio Quartz Lithium – Digital Watch from the early 1980s (Ref. 155B817)

This Casio Quartz Lithium dates from the early 1980s and embodies the clean, functional design approach that made Casio an icon of the digital age. The watch was completely disassembled, cleaned internally, and fitted with a new battery in November 2025. It is in good, worn condition with its original stainless steel bracelet.

Technical data

• Reference: 155 B817
• Origin: Japan WT
• Year: ca. 1982
• Functions: Hour, minute, second, date and day of the week display
• Display: Digital LCD
• Movement: Casio Quartz (extended-life lithium battery)
• Case: chrome-plated metal, stainless steel base
• Dimensions: 34.4 × 35.3 mm
• Lug-to-lug: 39.5 mm
• Height: 8.9 mm
• Lug width: 18 mm
• Weight: 49 g (including original strap)
• Bracelet: original Casio stainless steel bracelet with folding clasp
• Battery replaced: November 2025

Design and background

The Casio Quartz Lithium represents the transition from the early quartz watches of the 1970s to the multifunctional digital models of the 1980s. Casio combined, for the first time , slim case designs , energy-saving LCD displays , and a lithium battery that offered a significantly longer runtime than conventional button cells.

The clear, hexagonal case design and the minimalist display with its separate date indicator influenced the style of many subsequent models, such as the Casio A159 or F-81 . This makes the 155B817 one of the archetypal representatives of the early Japanese digital watch – functional, robust, and timelessly elegant.

Condition

The watch is fully functional, and the display has good contrast. The case shows signs of wear consistent with its age, but has deliberately not been polished to preserve its authenticity. All buttons respond cleanly, and the strap is original and closes securely.

A well-preserved collector's item with classic 1980s charm.

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

Notice
As this is a pre-owned watch, water resistance cannot be guaranteed. To protect the movement, the watch should not come into contact with water or moisture.