Abstract: Apparatus for use in providing printed wire markers, comprises a spool of unprinted wire markers, a casing for the spool, the casing bearing sensible indicia defining information related to the encased wire markers, a sensor for sensing the indicia and providing output signals indicative of the information and a wire marker printer for receiving the spooled, unprinted wire markers from the casing and printing thereon accordingly with the information. An elongate wire marker holder device for supporting a wire marker for imprinting thereon, comprises an elongate one-piece body defining an elongate opening and first and second elongate body portions cantilever-supported by the body in the opening and having respective free ends spacedly juxtaposed at a location distal from locations of contiguity of the elongate body portions with the body to define a slot therebetween.