Epact: Astronomical Ring Dial signed by Antoine de Succa, dated 1600
AN ASTRONOMICAL RING DIAL
Astronomical ring dial from hemisferium ICA. Adjustable for latitude and time of year till time like it's 1565 and find your way to something different | Utiles
Mid 18th Century Brass Astronomical ring dial. - Gilai Collectibles
Franklin Mint Universal Equinoctial Ring Dial 1987 |Accurate Portable Timepiece | eBay
Astronomical Ring of an unusual type, showing the side of the instrument "Butterfield Paris". Undated, circa 1690. This instrument is closer to an equinoctial ring dial than most astronomical rings. | Wellcome Collection