Perpetual calendar

1822-1869

Perpetual calendar showing the moon's age

Imitation amber, perpetual desk calendar in catalin plastic.

1948

Portable sundial and perpetual calendar

1693

Ornate brass Perpetual Calendar

1801-1830

A perpetual calendar in brass for determining the dates of Easter in the Julian and the Gregorian calendar

Perpetual Calendar in silver

1790-1860

German Perpetual Calendar in gilt metal

1701-1800

Byzantine sundial-calendar

400-600

Silver perpetual calendar, dated 1765

1765

Perpetual calendar, in brass box, German

Perpetual calendar, French

Perpetual calendar showing the moon's age

Prognosticator, brass, unsigned

1538

Pin box and perpetual desk calendar in bakelite plastic.

1935-1939

Perpetual calendar for the 19th century

1800-1899

Perpetual calendar

1822-1869

Seasons of Steam Perptetual Calendar

Combination pocket sundial and perpetual calendar by Johann Martin

1671-1720

German Perpetual Calendar

1700-1799