USS Macon w 4/9/1934 USS Northampton cancel and Richard Dumonte cachet, Ullmann/Mellone's #22.2 for this date.  The airmail cover has a sealed flap.               

Condition is as shown in the pics.  The cover shows minimal toning, and is still in quite nice shape.             

Ullmann/Mellone's reports 36 covers made and values that cover at $125.00.      

Shipping in the US is either by first class mail or by first class parcel, depending on value.  Shipping and handling for this lot is $6.00. Shipping to Canada is $16.00 and to selected foreign destinations (see list) is $26.00. 

See my other items for additional Macon, Akron, Zeppelin, Catapult, first flight, Canadian first flight covers, and FDC's. 

Note on storage and display of #10 covers:   Many collectors have a difficult time storing and displaying large covers along with their smaller counterparts.  I stumbled onto a simple method I thought was worth sharing.  I use BCW 2-pocket pages for smaller covers (pocket size 7.125 x 5.5 inches).  The pages are 8 x 10 inches total.  BCW also make a 1-pocket page exactly the same size, great for #10 covers - intended for comic books.  Both of these are illustrated in one of the photos.  They are sold on Ebay and can be obtained for as low as $20 for a box of 100. 

Number ten envelopes also fit nicely (without rotating) on larger pages compatible with many printers and scanners - 11 x 17, 12 x 18, 11 x 11, or 12 x 12, inch pages.

Thanks!