Radio-Controlled

PROMASTER

Year launched: 2003
12 categories: 05 / Functional Style

Commentary: Fusion of Sky and Radio Waves
With an inner rehaut and a dual-layer dial that create a wide display area, the design balances legibility and a sense of precision like an aircraft instrument, establishing a new value concept: the “fusion of sky and radio waves.” To achieve a wide-open case that expands from the case back to the dial, it was designed with a reversed approach compared with a conventional watch case, employing a reverse-side pressing form in which the upper surface is turned to shape the back. From a legibility standpoint, the function display that indicates the reception status is consolidated near the center of the dial and indicated by the tail of the second hand. The links of the titanium bracelet emulate an airfoil cross-section, letting you savor the true appeal of owning an aviation watch.

Link tags
Product code: PMD56-2771
CAL.: H411
Watch type: Eco-Drive radio-controlled
Case material: Titanium

https://ms.citizen.jp/assets/030_05-01_初代電波パイロット_01

The Base Design

This model breaks away from the conventional design of placing an aviation slide rule on a rotating bezel, instead incorporating a rotating ring inside the case and keeping the exterior as simple as possible. This design became the foundation for subsequent PROMASTER pilot radio-controlled watches and has been carried on for many years. It was also the first time that the reception function display for the radio-controlled watch was shown at the "tail" of the second hand, and that a double-layered dial was used for the Eco-Drive, attempting a dial design with a large visible area. These design techniques, now standard, originated with this model. Even though the dial could easily become cluttered with elements like the slide rule and minute track, the use of Arabic numeral indexes at 12 and 6 o'clock makes the time easy to read. The case design expresses a stripped-down, functional beauty without waste. The dial design skillfully conveys both legibility and a sense of precision. By combining a titanium exterior treated with MRK processing, Eco-Drive functionality, and radio-controlled features, the watch is light, scratch-resistant, never stops, and never loses accuracy, providing true practicality for users. This is a model where technology is brilliantly elevated through design, and its influence on CITIZEN's design philosophy is truly significant.