Chuck Guzis wrote: The background drives are probably 607's or 609's--the photo's too fuzzy for positive ID--but my money'd be on 607's which were far more common (I loved those drives and despised the 657 "cost reduced" replacements). Unfortunately, there are no mainframe cabinets anywhere in the photo-- what you see in the foreground are 3000-series controllers, but that doesn't mean a thing, as both the 3000 and 6000 series used 3000 peripherals for tape., card and printing. The 6000 used a 6681/2 channell converter, which then would interface to, say, a 3423 tape controller. The cabinet sitting next to the 415 card punch in the middle foreground is probably a 3447 punch controller. Maybe Billy Petit can recognize some of the cabinets--it's far too fuzzy to make out any numbers. Cheers, Chuck Billy responded: It is hard to tell much. The tape drives are definitely 606 or 607's. I'd lean toward 606 because the lights for density seem to be the 200/556 configuration, not the 200/556/800 set. The cabinets in front are unusual. The one on the right has a window in the top (see the shiny plate) and that was only done for printers. The one on the left also has two rows of lights, instead of one and that was only done on early printers (non-train) and one of the early disk file controllers. So my guess is that these two cabinets are dual printers. The photo is blurry but it looks like two of the tape units are set to Unit 4, which means a dual tape controller. Main frame is impossible to tell from these limited bits and pieces. Like Chuck says, 3100 to 6600. The number of tapes suggests a bigger system. Billy