My curiosity was piqued when I saw one portrayed on the Bond flick "Dr. No". Right at the beginning a British agent is using one to contact London and is murdered in mid-transmission.
I've found quite a few pictures, but little text about Antonio Geloso and his radio gear. The transmitter looks to be about equal to a Johnson Ranger (single 6146, plate modulated). I'm curious if they ever had evolved into newer models (solid state?) or were they just a flash in the boot.
I guess the Euro ops would best know . . . I've never seen one here stateside.