Fourth series cello pack, graded Mint (9) by GAI, may conceal incredible high grade keepers like: #288 Harmon Killebrew, #295 Minnie Minoso, #307 Brooks Robinson, #310 Ernie Banks, #314 Duke Snider, #320 Whitey Ford, #321 Sluggers Supreme with Williams, #343 Orlando Cepeda (RC), and #370 Yogi Berra among other pack-fresh beauties. High grade cello packs from the '50s are virtually nonexistent.