Pair of Vintage Brass Perpetual Calendars

These vintage brass perpetual calendars are about 4 3/8” in diameter and have a collapsible easel back for tabletop display. One has red enamel details, the other has blue. They have some patina/tarnish from age (see photos). PLEASE NOTE– these say “for 40 yrs, 1985-2024” on the front, however I can only find up to the year 2019 on the adjustable dial. It is easy enough to Google what past years have the same dates as the current year so they can still be used. Selling "as is."