In German called Zweiseitentaste Made by Jablonski - Berlin, Special made for "Ingenierurhochschule Für Seefahrt" - DDR. Students of this school were educated to become commercial and fishing naval officers and were allowed to use sideswipers to reach the necessary high standard of CW. More info on "Faszination Morsetasten" by Gregor Ulsamer, page 143.
In German called Zweiseitentaste Made by Jablonski - Berlin, Special made for "Ingenierurhochschule Für Seefahrt" - DDR. Students of this school were educated to become commercial and fishing naval officers and were allowed to use sideswipers to reach the necessary high standard of CW. More info on "Faszination Morsetasten" by Gregor Ulsamer, page 143.
