Rare,?vintage piece of diving electronics history: a Dacor underwater/surface signaling alarm housing wired directly to its companion AC power adapter supply block. The core sensor unit features a built-in vintage Mallory Sonalert Audible Signal buzzer module mounted cleanly inside the custom black Dacor utility housing. The power adapter block features the iconic, classic vintage blue and yellow Dacor corporate badge emblem. Good vintage cosmetic condition. The exterior plastic housings are solid with mild surface scuffs from handling and storage. The wiring insulation is intact and pliable. This unit is entirely untested and is being sold strictly AS-IS for parts, repair, retro scuba collecting, or museum display. Ships quickly and securely packed!