Abstract: A fastening mechanism for the interconnection of the opposite ends of a watch band or the like, the mechanism having a key for auxiliary use with a handle portion borne by one of the opposite ends of the watch band, affording shoulders convergent in the direction of the band, and an opposite shaft portion; a key holder secured on the other of the ends of the watch band dimensioned to form a recess to receive the handle portion of the key and to engage the shoulders thereof to prevent relative movement between the key and holder in the plane of the handle portion; and a closure received on the holder for selective engagement with the shaft portion of the key to prevent movement of the key from the plane of the handle portion.