Chemical Composition: ICP-MS/AAA data from sample, Leaded Bronze:
Cu, 73.74; Sn, 19.92; Pb, 5.66; Zn, 0.06; Fe, 0.05; Ni, 0.04; Ag, 0.02; Sb, 0.09; As, 0.34; Bi, less than 0.025; Co, 0.076; Au, less than 0.01; Cd, less than 0.001
ICP-MS/AAA data from sample, Leaded Brass:
Cu, 72.43; Sn, 1.97; Pb, 6.52; Zn, 16.85; Fe, 1.6; Ni, 0.13; Ag, 0.43; Sb, 0.07; As, less than 0.10; Bi, less than 0.025; Co, less than 0.005; Au, less than 0.01; Cd, less than 0.001
J. Riederer
Comments: Curatorial has record of a note that said: “Ignore old sample,” but did not indicate which sample is old.
Chemical Composition: XRF data from Tracer
Alloy: Leaded Bronze
Alloying Elements: copper, tin, lead
Other Elements: iron
K. Eremin, January 2014
Technical Observations: The patina of 1986.543 is metallic gray with brown accretions and spots of green; the surface is worn.
All four rings have lost some detail from corrosion and wear, with 1986.541 showing considerable loss of detail. All are broken at the points where the front meets the ring. 1986.543 has no ring. 1986.541 has a modern lead repair, perhaps with the original ring, and 1953.83 also has a modern lead repair with what appears to be a section of a modern ring.
The rings appear to be cast with no clear evidence of cold work in the relief decoration. The relief on 1986.543 is slightly higher than the other two relief rings; 1986.542 is carved in intaglio.
Henry Lie (submitted 2001)
