The GraLab Model 300 is arguably the most recognizable piece of darkroom equipment in history. Known for its oversized 8-inch luminous dial and signature buzzing alarm, it is an electro-mechanical workhorse that has remained virtually unchanged in design for decades. It features two three-wire receptacles designed to automatically control an enlarger and a safelight; when the timer is started, the enlarger turns on and the safelight turns off. Its durability is legendary, with many units from the 1960s and 70s still in daily use in professional labs today.