西藏乾隆57年银片, PCGS GENUINE, F DETAIL ,此币图案被当时被停用故极罕见;Tibet, Tibet, Qian Long (1735-96), Tangka, 57th year (1792), eight auspicious symbols around circular panel, rev. Tibetan legend around square circular panel, no clouds (C# 68), graded PCGS Fine Detail, repaired, extremely rare withdrawn type