(Stationery - Pens) Esterbrook's Steel Pens, illustrated ad design showing Pen Nib, on cover franked with 1881, 1¢ gray blue tied by indistinct cds and grid duplex, reverse with additional ad text and Award Medallions; some small tone spots, otherwise Very Fine. Estimate  $75 - 100. $0 (Image)

(Stationery - Pens) Esterbrook's Steel Pens, multicolored ad design on fresh cover showing Pen Box & Nibs, franked with 2¢ Columbian, "Broken Hat" variety tied by 1893 New York, N.Y. machine postmark, Extremely Fine and choice, a lovely gem cover. Scott No. 231  Estimate $200 - 300. $0 (Image)