D BEST Mountaineering was a small operation that did not produce many pieces. It belonged to Don Best of California and operated in the 1980s.
Quickie Slider Nuts work well in pin scars.
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↑ Set 655-656: D. Best Mountaineering Quickies #0–#1
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↑ 655: D. Best Mountaineering Quickie #1: 8 mm.
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↑ 656: D. Best Mountaineering Quickie #2: 10 mm.