Mailometer Co., Type IV, 1911-12 1c-2c (383-84, 408-09), small group including (all mint): 383 type IV pair, 383 type IV guidline pair, 384 type IV pair (3), 408 type IV pair (2), 409 type IV guideline pair and strip of four (disturbed o.g., small thin spots, and folded between stamps), all fine to very fine and useful, 409 type IV strip of four with 2013 Philatelic Foundation certificate (Scott $186)