Big Ben Moon Beam Retro Turquoise Blue Alarm Clock. Art Deco Retro Alarm Clock. Once dubbed "The Considerate Alarm", it gradually wakens sleepers with a flashing soft LED light that increases in intensity. After 4 minutes, it sounds a bell alarm to waken heavier sleepers.Big Ben Moon Beam Retro Lavender Alarm Clock Art Deco Purple Works great!! Has backlit dial and flashing light & alarm works well. Dimensions: 5”H x 6”W x 2.5”D. In great condition! Electric plug in I think this is not vintage technically, but definitely 1950's 1960's Retro Vintage vibes