The frame is a CK Turk "Caravan" topper that was an aftermarket accessary. It was in pieces in the bed of the truck when I bought it and I almost threw it away not knowing what it was. It had a canvas cover and fit many of the old trucks. It cost $89 which was a lot of money back then.
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topper2.jpeg (83.13 KB, 135 downloads)
topper3.jpg (263.93 KB, 128 downloads)