Those are 645 format using 120/220 film. The Mamiya or Pentax 645 come to mind.
Ah! Memories.
That takes me back to my very complete Bronica ETRS system (6 x 4.5 cm), owned from 1983 to about 1995. Had 3 backs for 120 film (100 & 400 colour slide & B/W neg) one for 220 film plus a 35mm film back. Had 4 lenses wide to tele, 2x tele converter plus macro lens and bellows. Prism viewfinder and side grip. A delight to use, but a beast to carry (not all stuff carried at the same time of course).
Bought for something like Oz$6,000 and when sold on consignment in a Sydney shop eventually netted me something like Oz$10,000 - a seeming dollar profit but inflation was raging in the meantime. :-(
So nice to use, but my increasing age and camera size didn't match so got 35mm film after that until digital rolled in.
Went the whole hog and bought a 6x6 magazine type slide projector plus about 50 magazines to hold my trips in, made nice slide shows.
Sorry about that interruption, now back to the regular program....