Wang Model 370

Howdy, Went on a rescue last night and while there were three machines I knew of (a PDP-11 that I'll give more details on later, haven't looked at boards, etc, since it was part of a Particle Measuring System, an HP 85-ish machine and a slightly later HP machine) there was one thing that I hadn't known about... (aside from the very cool old GE 'scope that the guy is keeping... ) A Wang Model 370 Calculating System with a Model 372 Data Storage System. Gotta say this is the oldest thing I've picked up (1967 it came out). No idea if it powers up or not... Definitely needs a cleaning (basement, fairly dusty unit) but before I did anything, was wondering if there are any experts out there that have worked on one of these before who'd be willing to share any helpful hints on verifying this is working... Thanks... EarltheSquirrel