I saw this on another forum, and thought of you right away, since I know you're into Holmes wreckers. Maybe you already have it, but thought I'd post it just in case.
That's a Neat ad. I don't have a Holmes 485 unit, but I do have a set of Holmes "V" Tow Bars, and the Holmes Steering Clamp. Those items were in my 1952 GMC COE, with Holmes Heavy Duty model W35 unit.
Spanky Hardy Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers