1913-15 Issues, Plate Blocks (424/437). Nine plate blocks of six, including Nos. 424 (two wide top, one Mint N.H.), 424-425 blocks of 10 with "COIL STAMPS", 426 (wide top), 428 (narrow top, barely hinged), 429 (Mint N.H. side), 437 (bottom), Fine-Very Fine and attractive group