UNITED ARAB EMIRATES. Sharjah. Silvered Uniface 2 Riyals Reverse Trial, AH 1389 (1970) (1970). NGC PROOF-61. cf. KM-3. Mexico World Cup of Soccer. This trial strike exhibit frosty devices and reflective fields with mottled dark toning on the design side. The non-design side is stamped "MET. / GORI & ZUCCHI".