1.) <#airmail=air mail> flights flown by army pilots from May 15 to August 11, 1918.  Beginning August 12, 1918 the mail was flown by civilian pilots.  2.) air mail flights flown by army air corp pilots during a short, disastrous "emergency" period in 1934 when President Roosevelt cancelled <#cam=CAM> contracts.

a <#marginmark=marginal marking>, shaped like a "V" which served as a guide for cutting <#sheet=sheets> into smaller units, and as a guide in the perforation process.

<#marginblk=margin block> with a "V" shaped <#marginmark=marginal marking>.

private printer of <#poststamp=postage stamps> since in 1991, and of <#stampenv=stamped envelopes> since 2008.  Printer of the first <#commem=commemoratives> produced exclusively by <#offlith=offset lithography>, the 1992 Wildflowers Stamps <#pane>,  <#scott=Scott> 2647-2696.

a striking <#dbltran=double transfer> on the 1861 2¢ black Andrew Jackson <#poststamp=postage stamp>.