Karel Martens: Birthday Calendar

<p>By Karel Martens. Published by Roma Publications (Amsterdam), ROMA #512.</p><p>A wall-hanging perpetual birthday calendar with layered, multi-hued patterns based on a single geometrical composition punched out of coloured cardstock in multiple directions. Originally conceived by Martens in 1968, the design remained unrealised until now.</p><p>Softcover, 11.75 x 16.5 in, 14 pages.</p>