AVAB 211 (1987)
24, 48, 72 way control
From Richard PIlbrow: Stage Lighting Design: The Art, the Craft, the Life
"This control is available in three versions: 24, 48 and 72 channels. Faders control channels or submasters with up to 150 recordable presets. Gang-loading function piles multiple presets and speeds onto submasters."