Auction 309-320 - Europe & Overseas Egypt, including the Constantin Kelemenis - Day 4

1919, Trans-Atlantic Air Post $1 on 15 c. scarclet, unused block of four, original gum, well positioned, showing variety 'no comma' after "POST" on bottom right stamp, as well as "A" of "AIR" under "a" of "Trans", fresh printing, rounded perf. lower corner, otherwise very fine and scarce. Gi SG143, 143a & 143c = £795+ priced as singles.