One of the most interesting watches I've ever come across is this Seiko Frequency watch. That shiny panel on the face is actually a speaker, and gets decently loud. Functions include an adjustable metronome, a selection of drum beats (also tempo adjustable), and a "swing" mode that kind of gives everything a triplet feel. NOS condition, only taken out for pictures and to ensure functionality. Asking **$219** for this JDM piece.