For sale is a Knot open heart CAP-38 model with a charcoal gray dial. This charcoal dial was an incredibly popular color when the open heart model debuted, making it difficult to obtain. The strap can be purchased separately from Knot, according to your preference. It can be attached with a slide lever, so you can have several and change them depending on your mood, which will likely increase your collection of straps. I am selling this item to organize my collection. If you are looking for one, how about it?