hobbytown of Boston HO Gauge, James Demlow's personal B unit proto-type with paper work to support. B unit is unfinished as stated in the paper work, two others finished were to stay in Jim's possession, paperwork states only a total of 48 units were produced. Unit includes box with deteriorating styrofoam. Box has handwritten information. Two unused kits included. No. 87612F-2 Diesel Locomotive Kit; SD-45, SDP-40 and U-28-C, Flywheel Drive Power Chassis, C9-10 with instructions. Foam is deteriorating. No. 27608C Alco 2000HP Road Diesel Centrifugal Clutch Power Conversion Kit, C9-10 with instructions. Foam is deteriorating. Price sticker, some rubber band remnants, paper tape, etc. Boxes are square and solid.