Most likely not DEC. The blank handle says as much, and the part numbers you gave are not in the DEC standard format. Also, I would not expect "R-K" in a DEC references to the RK05/RK11.
paul > On Aug 29, 2018, at 2:28 PM, Bill Degnan via cctech <cct...@classiccmp.org> > wrote: > > I have what I believe to be two DEC RK05 bootstrap boards each with a ROM > labeled 802350 A. UNIBUS. The plastic handle tabs are Digital Equipm.'s > but it could be an OEM as there is nothing printed on them. > > On the board is printed on what would be the bottom front side > R-K ABBR BOOT P.C. BOARD 609395 REV B > on one line and under that > 802000 REV > > There is a round sticker on the back of the board written in pen that reads: > LL > 802000 > Rev B > 6-17-76 > > printed on the backside of the board near the sticker is 609395 REV B > > I use a M9312 to bootstrap from the monitor but I am curious how I'd > attempt to use one of these. Any thoughts? > > Bill