{"title":"Perpetual Calendars – Various Manufacturers (17th Century–Present)","description":"\u003cp data-pm-slice=\"1 1 []\"\u003ePerpetual calendars are reusable devices designed to determine or display the correct day and date across multiple years without requiring a completely new calendar each year. The category encompasses desk calendars, rotating wheel calendars, block calendars, sliding calendars, mechanical calendars, advertising calendars, and decorative novelty designs produced by numerous manufacturers.\u003c\/p\u003e","products":[],"url":"https:\/\/deflectordc.co.uk\/collections\/perpetual-calendars-various-manufacturers-17th-century-present.oembed","provider":"Deflector DC","version":"1.0","type":"link"}