Number One Joel de Guzman June 19, 2015 The very first XR, serial number XR156-1 ready to go! This one goes to Charles Richardson. I feel some kind of attachment to these pickups, like a photon in a quantum entangled state. Go forth and rock, Number One! Tagged Pickups, Release, XR Series Post navigation Previous Previous post: Soapbar Take 2Next Next post: XR Preamp Schematic