Ruhla – 1970s
During the 1970s, the East German watch industry was further restructured and UMF Ruhla became part of the VEB Kombinat Mikroelektronik Erfurt. It was in this decade that Ruhla moved towards developing both analogue and digital quartz products. The first quartz digital watches were put into production as the UMF 28-40 calibre.
An electro-mechanical stop watch was tested during the first space mission undertaken by Sigmund Jähn of the East German Air force aboard Soyuz 31 and 29 to and from the Salyut 6 space station in August/September 1978.