Hi, nice find! I think they are IVC 301's
http://www.tvcameramuseum.org/ivc/ivc300/ivc301page.htm
I haven't got any decent pictures of that model and I would be very pleased if you could send me 2 or three that I could add to my site? of a reasonable size so I can do the cutting out thing. also of the CCU if you have that.
Or at least permission to use your posted pictures.
Happy to give personal or site credit, please say. thanks
PM me for email address.