Russia. Brockage Obverse and Reverse Die Trial for Platium 150 Roubles, 1988. As Y-215. Planchet weights 2.6 g and 3.0 g (uncertain metal). Obverse; National arms. Reverse; Chronicier writing. For 1000th Anniversary of Russian Literature. Lot of 2 coins. NGC graded Both pieces Mint Error Proof 66 Ultra Cameo. Estimate Value $200 - 300