Sorry just seen this. I've seen those calls, every once in a while you'll find one on ebay. They sounded good, but didn't last to long, guys would leave them sit on their truck seat or the dash and the sun would raise heck with the plexiglass. Most were missing the plugs for the bottom, they'd fall out while in the field. I believe they were made back in the mid-late 70's, but they didn't make them for long. Not sure what the name was, if it even had a name?