(Note: Measurements are outside max. dimensions unless stated otherwise).
19th Century : Regency patera with conical fluted design.
Diam. 8mm. (5/16")
Height 8mm. (5/16")
Tang length 15mm. (9/16")
Single central tang on reverse.
It is recommended that if selecting screw thread option, a pilot hole is drilled and pre-cut with a steel screw of slightly smaller size before screwing in the casting to avoid shearing.