From 1981 to 1987 the obverse and reverse of the 8 g gold coin were the same as that of the 15 g silver coin. The exception being in 1985 when the reverse differed. 1987 seems to be special: (1) both the 5 oz.
From 1981 to 1987, the obverse and reverse of the 8 g gold coin were identical to those of the 15 g silver coin. The exception was in 1985 when the reverse differed. 1987 appears to be unique: (1) both the 5 oz.