I acquired this rack from Geary Schindel at the 1995 Old Timers Reunion.
My Cole rack is 290 mm. tall, 70 mm. wide, 29 mm. thick, and weighs 647 g. The frame is made from 9.5 mm. steel bent into shape, with an internal width of 33 mm. and a 25 mm. diameter wrapped eye. There are seven brake bars, composed of a mixture of Gerry and REI bars.The bars are 19 mm. in diameter and 66 mm. long. Allowing 45 mm. for the rope gives a 56 mm. range for spreading the bars.
The Gerry brake bars are stamped "GERRY" and the REI bars "REI."
John Cole is credited with developing and publishing (New Rappel Device, NSS News v24, #6, June 1966) the design of the Rappel Rack, so this rack has some historical interest. John made a number of racks with minor design variations. Most of these were designed to fit inexpensive, commercially available brake bars. Although seven bars are on the rack in the photo, that is too many for this rack: it should be used with only five or possibly six bars.