Key Specs
From manufacturer listings and retailer data:
Module: 2550
Movement: Quartz (battery-powered)
Case size: ~36 mm wide, ~11 mm thick
Case / band: Resin (some variants used aluminum or steel)
Crystal: Mineral (scratch-resistant)
Battery: CR2016 (~2-year life)
Water resistance: ~30 m (basic splash resistance)

Functions (this is where it shines)
Databank memory: ~50 entries (up to 63 characters each)
Calculator: 8-digit with basic math functions
World time: ~26 time zones / 100 cities
Alarms: 4 + snooze
Stopwatch + countdown timer
Auto calendar (to 2039)
Backlight (EL)
Password-protected data storage
👉 Essentially, this was a “wearable organizer” before smartphones existed.

📅 Year / Production Era
First released around 1992
Produced through the 1990s into early 2000s
Now discontinued