rohumpy, you are correct the spacing combination was tried on many sheet and coil stamps from 1909-1912. Since the imperfs were normally made from regualr plates both spacings are also found on some imperfs. Both spacings are found on 331, 332, 333, 334, 335, 343, 344, 346, 352, 353, 354, 357, 358, 367, 368, 369, 374, 375, 376, 377, 378, 379, 380, 381, 383, 384, 387, 388, 394, 395. Stalzer, Your's are 3mm. Scott does not price these in block of 6 or as NH block of 4. Approximate value is calculated as 2x NH singles + block of 4 3mm + 170 (4x42.5) NH premium. edit: Typo |