SASANIAN AGATE SEAL DEPICTING A CRESCENT STANDARD Ca. AD 200 - 600. A domed agate seal with a circular face and perforation through the lower section. The surface is engraved with a crescent-topped standard flanked by a script. For similar see: Brunner J., Sasanian Stamp Seals in the Metropolitan Museum of Art, 1978, p. 125-127. Size: 20mm x 20mm; Weight: 8.41g Provenance: Private London collection; previously in a 1980s Mayfair Family private collection.