1966 Topps USA Test Hockey #17 George Armstrong card graded PSA GEM MINT 10, a near-impossible grade for this set. Out of the 2,832 1966 Topps Test Hockey cards submitted to PSA, for all players, PSA only awarded the perfect Gem Mint 10 grade to three cards. This example, #25 Orland Kurtenbach, and #66 John McKenzie. It has a clear image of a smiling Armstrong against a rink and stadium background. Centering is perfect with four sharp corners and smooth edges. The reverse is clean and bright.