Here's my favorite wheel (above). Sorry for the condition. I bought it in the 80s and it's been stepped on, spilled on, ripped and repaired many times since. It may be out of print now. The copyright name is just an address: Box3193 Amarillo, Texas 79106.
Here's my second favorite (above). It's a reminder that there are warm and cool versions of every color.
Here's the version (above) currently sold in the art stores in my area. I took off the rotating wheel and use it as a single card.Here's the Itten wheel (above): Shades on the outside and tints on the inside. 'Not that useful for what I do but I have it on my wall anyway because it's so beautiful and mysterious! I should put up a Munsell wheel too but I can't find one that I like.