Smart Looking Old Brass Perpetual Calendar mid-century royal copenhagen 19" in diameter

19" in diameter

are just fantastic — a quintessential example of machine age design

with a slightly squarish shape to the rings

I'd guess it dates to the 60s or 70s and believe that it is bronze

I also really love the super alert

Smart Looking Old Brass Perpetual Calendar mid-century royal copenhagen 19" in diameterSimple as can be, telling nothing more than the day of the month, but great looking I think, and pretty fun to count the days on. Turning the center knob dials the first number and punching down on the top knob changes the other. 4 1 8" t x 4 3 8" w x 1 1 2" deep, very nicely made and in good I think likely antique condition; I would guess 1900 1920 or so.