Citizen Eco-Drive World Perpetual A-T Watchsearch

Citizen Eco-Drive World Perpetual A-T Watch

Citizen Eco-Drive World Perpetual A-T Watch

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RC Watch With Near-Atomic Accuracy

This radio controlled watch benefits from atomic timekeeping (A-T), as its quartz oscillator synchronizes automatically—or, should you choose, on demand—to an atomic clock via one of five radio stations around the world. This means, for all practical purposes, that the watch offers the accuracy of an atomic clock. And because it’s equipped with Citizen’s solar-powered Eco-Drive technology, it doesn’t require a battery and offers a 2-year power reserve. It also boasts a perpetual calendar, which accounts for leap years as well as odd and even months, and a daylight saving function between 4 and 5 o’clock.

Note: This drop is limited to 18 units.

Citizen Eco-Drive World Perpetual A-T Watch
Citizen Eco-Drive World Perpetual A-T Watch
Citizen Eco-Drive World Perpetual A-T Watch

Dial Design & Features

Featuring a black dial with a textured background, the watch is fitted with two lumed sword-style hands and a seconds hand with a hilt-shaped counterweight. Marked with 26 different city names, the stationary bezel provides quick reference to time zones around the world, while the rehaut features positive and negative Arabic numerals that correlate with these time zones. A date window sits at 3 o’clock, while the 9 o’clock position displays a radio reception indicator: “OK” means that the reception was successful; “RX” means it’s currently receiving a signal; “NO” means that the reception was unsuccessful.

Citizen Eco-Drive World Perpetual A-T Watch


  • Citizen
  • CB0027-51E
  • H145 Eco-Drive solar quartz
  • Setting instructions
  • Automatic or on-demand radio calibration controlled by the pusher at 4 o’clock
  • Perpetual calendar (until February 28, 2100)
  • Date display at 3 o’clock
  • Power save function
  • 2-year Eco-Drive power reserve
  • Insufficient charge warning
  • Sold end links
  • Sapphire crystal
  • Case width: 43 mm
  • Case thickness: 10.6 mm
  • Lug width: 22 mm
  • Lug-to-lug width: 49.25 mm
  • Water resistance: 200 m


  • 1-year Massdrop warranty


All orders will be shipped by Massdrop.

Estimated ship date is May 19, 2016 PT.

After the drop ends, payment will be collected and the group’s order will be submitted to the vendor up front, making all sales final. Check the discussion page for updates on your order.