A tougher group of cards, the 1934 Exhibit 4-on-1 series is a 16-card set, mainly differentiated from its predecessors by muted color tints, which include lighter shades of blue, brown, green and violet, all printed on white stock.  

Pair of qualified cards from the issue, both graded EX 5 with a qualifier by PSA.  Collection includes: 1) Burns/Melillo/Hadley/Helmsley, with a "MK" qualifier to address the year of the card issue written on the back in pencil and again in ink.  2) Mahaffey/Foxx/Cramer/Higgins (HOF), with a "MC" qualifier that is debatable; the card is certainly off center and should be qualified as such, the lower-left border of Cramer's image is still entirely visible and not technically miscut.  Two cards total.