Rare 1987 Casio TM-100 . In a decade known for bold innovation and quirky tech, Casio’s TM-100, released in 1987, stood out as one of the most fascinating wristwatches ever made. More than just a timepiece, the TM-100 doubled as a wrist-worn FM transceiver, allowing users to transmit their voice to a nearby radio frequency—a feature far ahead of its time.
At first glance, the TM-100 looks like a sleek digital watch of the late ’80s. But its most striking feature is the extendable antenna, neatly housed along the strap. With a built-in microphone and an FM transmitter, this watch allowed users to broadcast audio to a nearby FM radio (usually within a 30–100 foot range), essentially turning the radio into a wireless speaker for your voice.
While not a two-way communication device like a walkie-talkie, the TM-100 carved out a unique niche—ideal for fun, pranks, or short-distance announcements. The voice transmission feature was especially useful in classrooms (sometimes to the dismay of teachers) and among curious tech hobbyists.
Key Features:
- Digital timekeeping with alarm and stopwatch
- Built-in FM transmitter (88–108 MHz)
- Extendable strap-mounted antenna
- Compact microphone and speaker system
- Operated on standard watch batteries
The TM-100 is now a rare collector’s item, cherished for its novelty and the bold spirit of experimentation it represents. Few functional units remain in circulation, and working models are highly sought after in the vintage tech and watch enthusiast communities.
In an age before Bluetooth, smartphones, or smartwatches, Casio envisioned a playful kind of connectivity. The TM-100 wasn’t just wearable—it was talkable, shareable, and incredibly ahead of its time.
Own a piece of wearable tech history—where innovation meets nostalgia, and retro charm still speaks volumes. Rare 1987 Casio TM-100
