Perpetual calendar - Five perpetual calendars, intact, complete and functional

Plastic material five perpetual calendars, in very good condition with rare use and minor signs of wear due to age, comprising three manual mechanical units and two keypad-operated units, all complete and functioning, with a circular calendar of 26 cm diameter and a generally 26 x 26 x 10 cm form. Era: 1900-2000. Condition: Excellent condition: barely used with minimal signs of wear.