I'm trying to identify all the stamps (and post cards or postal stationary) that depict the Jenny and the DH-4.
The Jenny first:
C1, C2, C3 -- the first US airmail stamps
C74 -- 50th anniversary of mail
2781 -- National Postal Museum Stamp
3142s -- Classic American Aircraft Panel
4806 -- Inverted Jenny stamp
A couple I am not sure of:


Any opinions or information about whether these are "Jennies" will be appreciated.
Now for the DH-4:
C6 -- is a "De Haviland Biplane"
What about the "mail planes" on C7, C8 and C9? Are they DH-4's, or "generic"?
Any other US postage stamp depicting the DH-4?
As for postal stationary or post cards, the only one I know of, for either, is UCX17, depicting the Jenny. Have I overlooked any?
Thanks for any help you can give me with this.
Basil
Edit: Fixed the wrong # for the inverted Jenny stamp. Meanwhile, while I cannot find any source for the two stamps I posted images of being "Jennies," I'm pretty sure they are intended to be. Both have 8-cylinder engines (like the OV-5), and have other similarities.
Confirmation of the DH-4 on C7-C9 here:
http://arago.si.edu/index.asp?con=1...&tid=2033366