Up for sale is a rare and highly collectible vintage Casio Twin Graph II AE-21W men’s digital sports watch, produced for the Japan Domestic Market (JDM) in the 1980s and powered by Module 809. This model is one of Casio’s most iconic and sought-after designs from the golden era of digital watchmaking, celebrated for its distinctive dual-graph display and bold, technical aesthetic.

The watch is in full working condition, with all features and functions operating properly, including timekeeping, alarm, chronograph, dual graph display, and calendar functions.

The display shows overall fading, and some of the graph elements can be difficult to make out depending on lighting conditions. This is reflected in the photos and does not affect basic operation.

The watch is fitted with an aftermarket Casio Twin Graph strap. It shows signs of use and age consistent with an authentic vintage piece. The photos best describe its physical condition.

Key Details:

• Brand: Casio

• Model: Twin Graph II AE-21W

• Module: 809

• Era: 1980s

• Market: Japan Domestic Market (JDM)

• Display: Digital with dual graph layout

• Functions: Time, alarm, chronograph, dual graph display, calendar

• Strap: Aftermarket Casio Twin Graph strap

• Condition: Fully working; display shows fading; signs of use and age

This is a truly iconic Casio model that rarely comes up for sale and is highly desirable among serious Casio and vintage digital watch collectors.

Ships carefully. Feel free to message me with any questions.