Sorry for the lack of photos, so come to the repair clinic to see it in person!
MARCH has new unused rolls of plotter paper that seems to be for a Houston Instruments plotter with pinfeed edges. The holes are smaller and closer together than the Calcomp plotter.
1 box of 6 rolls:
36" wide drawing area, 36 1/2" including the holes
2 3/4" diameter
the box only says "RC 000000". No mfgr on box or paper.
3 boxes @ 6 rolls + 2 loose rolls
23" wide, 2 1/2" diameter
the box says
Graphic Controls Pen Plotter Supplies
RC 000000 to fit Houston
It's all clear white paper, no graph paper!