Not _impossible_ (since the RP11 does have one row of 36 lights - no doubt because it can be used to read packs written by PDP-10's - it's the shift register for reading the bit stream off the drive) but I'd say less likely, given the two rows of 36 bits. Or maybe not; one is a shift register, the other is a Longitudinal Parity accumulator, which would also naturally be the same word length. In fact, I have a picture of an RP11 panel, and... the one in the back _is_ an RP11! Well, knock me over with a feather! I've seen images of (or worked out the light pattern for) two, the TS08 and the RK08, and this isn't either one. (Both have only two rows of lights.) I wonder if there's an RP08? {Checks} Yes, there is. Do we have prints? {Checks} Yes. Alas, the scans of the connector pages of the prints are pretty bad, but it doesn't seem to support a display panel. Oooh, thanks very much, that will be _very_ helpful. Hmm. Could be; now that I have the better picture, let me see what I can turn up. I note the 'sector word count' has 7 bits in it, which kind of implies a PDP-10 - most PDP-11 disks had 512 bytes / 256 words -> 8 bits. Although maybe there are a few early ones that had 256 byte sectors, I have this vague bit set that there were; will have to check that. I think I'm going to have to create a page for DEC indicator pabels! Noel