Miniature Astronomical Ring Dial - Hemisferium | Boutiques de Musées
Epact: Astronomical Ring Dial signed by Antoine de Succa, dated 1600
Astronomical Ring Dial – Obscuriosity
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
Universal equinoctial ring dial | Royal Museums Greenwich
Universal equinoctial ring sundial, astronomical ring dial | Science Museum Group Collection
Epact: Astronomical Ring Dial signed by Johannes Motter, mid 16th century
AN ASTRONOMICAL RING DIAL
Male Jewelry Accessories | Astronomical Sphere Ring | Astronomical Ball Rings - Ring - Aliexpress
Astronomical rings - Wikipedia
Mid 18th Century Brass Astronomical ring dial. - Gilai Collectibles