A set of 4 Heathkit XO 1 crossover knobs, 2 "Hash Mark" & 2 small knobs. Clean! $19.00 USD Sold on: 2013-Nov-03 Marketplace: eBay 1 Treasure 0 Trash 100% Detail: A set of 4 Heathkit XO 1 crossover knobs, 2 "Hash Mark" & 2 small knobs. 2 Heathkit "Hash Mark" knobs, Set Screw, 1/4" shaft, 1 1/8"Diameter at base and 2 small knobs. More Relevance Historical Items
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