Wire-wrapped boards are easy to "modify"!
The image on the right shows the Watson MX4. Watson & Sons was later absorbed into the GEC empire (as was Picker, albeit much later), and it was the later (improved) GEC MX4 that was used as the basis of the replacement for the Picker field unit I have been referring to. I'm not sure if they kept the rest of the system (folding table
etc.) ... others may know (@Malcolm) ... by that time I had been moved on (pushed out) to sandier pastures.
GEC MX4
manual and
circuit (as used on the famous "Arborfield course" fifty years ago).
I'm not sure where Picker stands these days (if at all). There have been various "mergers and acquisitions" and associations over the years: names like Dunlee, Philips, GEC, Marconi
et al - even RCA - all figure in the story.
Meanwhile, here is a dramatic
YouTube video that stars the old Picker field unit ... not much ALARA or staff H&S going on there! Notice there is no mention of the associated "manual" processing tank(s) ... or the time it takes to dip the film.
