Bill Sample is a local Colorado Bonsai Pot maker and he makes wonderful Bonsai pots for trees and accent plants. In my opinion Bill’s black clay pots are his best pots and the quality of the craftsmanship shown in Bill’s pots ranks right up with there with Sara Rayner and Chuck Iker. The Denver Botanic Gardens has several Bill Sample Bonsai pots in their collection, that should tell you the quality of Bill’s pots.
Here are some examples: