Djupvisare

Svenska Radioaktiebolaget

Ekolodanläggning, delar därtill. Märkt: Djupvisare Typ 855 App nr 29165 110 Volt = 50 volt 10 P/S. Svenska Radioaktiebolaget Stockholm.

Naval Museum

A black and white photograph shows a complex circular dial instrument with multiple concentric rings, markings, and a central logo. A small gauge and a switch are visible to the right of the dial.