Junghans Mega

worldwide first radio-controlled wrist watch

JUNGHANS MEGA is the name of the world's first radio-controlled wristwatch with hands.[1] It was manufactured 1991 by the German watchmaker Junghans.

Description change

Radio clock wrist watch MEGA

The watch has a partially gold-plated stainless steel case. It has a white dial with two golden hands and a rectangular liquid crystal display and is protected by a circular, scratch-resistant mineral glass. The brown leather strap contains the antenna for receiving time signals from the radio transmitter. The watch is equipped with time zone adjustment, perpetual calendar (weekday, date, month), digital seconds, internal time memory, signal reception indicator and a transmitter call button.

Technical Specifications change

The MEGA is equipped with an integrated radio receiver with a wrist antenna for receiving time signals on the longwave frequency of 77.5 kHz.

Synchronization of time with the time signal transmitter is performed at 2:00 and 3:00 AM. In case of reception issues, the synchronization is repeated every full hour until 6:00 AM. The time accuracy of the Junghans MEGA radio-controlled wristwatches is 1 second in 1 million years.

The quartz movement is of type w605 with a quartz time base of 32 kHz. The power supply comes from a 3V lithium battery.

History change

In 1985, Junghans introduced the first radio-controlled desk clock to the market.

1990 the manufacturer's engineers successfully miniaturized this technology. Now it could fit into the case of the digital wristwatch MEGA 1.[2] In 1991, Junghans released the analog version MEGA with traditional hands to the market.

References change

  1. "Neuheiten-Katalog 1991/92, Junghans Uhren GmbH" (PDF). junghansarchiv.de. JUNGHANS. Retrieved 25 January 2023.
  2. "Mega 1". The Royal Museums Greenwich. Retrieved 26 January 2023.