1917 Special Delivery Messenger (E1)

Largest known multiple of this scarce stamp
Experts of this issue have estimated +/- 150 unused existing copies.
7 used copies are known to exist 3 of them being on covers
This sheet is a new discovery that has not yet been recorded.
Previous largest multiple was 25 but I believe it was split up.
Scott Catalog value for this stamp have seen an increase of 60X in the ten year period of 2003-2013
Item is available to the serious buyer for $2,250

Update from Linns June 15, 2015
"This stamp is in steady demand and we previously tipped it in the Oct. 19th, 2009, and May 20, 2013, Stamp Market Tips columns in Linn's. In the 2014 edition of the Scott Standard Postage Stamp Catalogue, this special delivery stamp was valued at $60 in unused hinged condition and $150 un used condition, and even then it was undervalued. Examples in unused hinged condition are currently selling in the $50-to $125 price range, and the latestrecorded sale of a used example brought $168. Unaccountably, the 2015 Scott Standard catalog lowered the values for this stamp to $7 in both unsed hinged condition and used condition. The new values are obviously a mistake. Editor's note: Scott editors said that the $7 value is an error that will br corrected in the 2016 Scott Classic Specialized Catalogue of stamps and Covers with values of $60 used and $150 unused, both in italics. Demand for this stamp remains very strong, and it is a good buy at the prices given above".

Associated links:
Colombia Express 1917
Filling Spaces write up on the stamp