Watch List notes:

Mexico, Petroleum Expropriation 40th Anniversary, AR Medal, 1978, by Ángela Gurría, EXPROPIACION PETROLERA, bust of Lázaro Cárdenas facing forward, rev. EL PETROLEO ES NUESTRO, hydrocarbon molecules, plain edge, 34.33g, 40mm, brilliant surfaces beneath slight frostiness, lightly toned, extremely fine.

Estimate: £40 - £60