(6637) 1937 50C PCGS PR67+ CAC

CAC. PQ 37 Proof Walker in 6+ cac. Brilliant gem quality, claims to 68. Recent 67 non plus cac @ 2340 and 67+ cacs at 2640 and 3055. 68 non cac 5000+. 68 cacs, just half a point higher, last trade @ 15600!