The "677" is a smooth-flowing bent Billiard, with a curious combination of a rather Danish bowl design, joined to a triangular-sectioned shank and stem. Each briar of the Tortuga series sports not only a tortoiseshell-patterned stem, but also a domed, shell-like cap with a foam-rubber stopper. The purpose of the latter is to preserve an unfinished smoke which one wishes to pick up again and finish later.