Watch List notes:

Russia. Brockage Obverse and Reverse Die Trial for Platinum 150 Roubles, 1993. As Y-397. Planchet weights 1.7 g and 1.6 g (uncertain metal). Obverse Double-headed eagle. Reverse; Ballerina. Lot of 2 coins. NGC graded Both pieces Mint Error Proof 65 Ultra Cameo. Estimate Value $200 - 300