Dolt #5 Bashchock, Photo from: vintageclimbing.com, gear for sale, 11/2023 - #5 stamped over #10
Summit magazine Dolt ad
This is possibly when Dolt made the Purple #6 Spidernut and #10 Trunut. Dolts usual line was 14 nuts, but the Dolt ad in the March 1971 Summit magazine shows 16 Colornuts. All of the Spidernuts and Trunuts at this time possibly became colored.