Need Help With US Possession Canal Zone A11 Design

I have the US Canal Zone Possession A11 design can not find scott number for it. It appears to be imperf Stamp has good margins all around so I do not think it was trimmed. Any Ideas?

Look under U2 for envelopes maybe?

Peter

Yup, this is a U2 envelope cut square. There are no imperf CZ stamps, unless it is some sort of proof. The 2cent envelope (actually a Republic of Panama design with the "Canal Zone" added to the die, not overprinted later, like the stamps were) was issued in 1916, in 10 printings, total 1.5 million, all issued. The first printings were carmine and black, with subsequent ones red and black. An entire used envelope runs around $20 or so.

Thank you for the information !