It also looks a lot like the very rare bench setup of the 5108 (i.e DVB) - which limits you to a 240mm lens for 8x10 - most of the bench ones were reportedly sold for photocomp work and the like. Easy to convert it to the wall model (DVW) if need be - or put it on the accessory floor stand (different from the DVF native floor standing type). I went the other way & converted a wall mount pin-reg 5108 into a bench one...

It also has the 500 Analyser system onboard by the looks of it, rather than a timer - you can take the plug from it & rework a suitable timer for the machine - or simply use the plug as a shorting plug for the control box & use a metronome.