| /Just 1572 letters were sent on the first flight, many affixed with one or two stamps from the first airmail issue. This cover to Mexico has examples of each of the five stamps from the first printing (Scott C1 to C5) with an additional 10c orange without overprint. Note that the 40c on 50c has 'raised i and o in Servicio' variety. First day cachets plus forwarding agent's oval handstamp and two Servicio Aereo Mexico receiving handstamps to reverse.
| /Marginal pair with Hamilton Banknote imprint. Vertical imperforate on both sides for the left hand stamp and imperf between for the right hand stamp. Pencil notation.
| /Listed variety printed in green instead of the issued red. An early Seebeck. Ungummed as printed with no previous hinging.
| /ABNC Archive File Index card for the 1946 airmail issue with instructions to adapt the die for the regular stamp (Scott 539-541). Die proof on India affixed to card with associated typed notes. Unique.
| /A near complete Perkins Bacon proof sheet on ungummed paper. Originally a sheet of 100, this is the largest known multiple, with Plate 3 indicator to upper right. A few small tears to the left-hand selvedge not affecting the proofs.
| /ABNC die proof depicting Antonio Narino. Printed in the issued color as part of the Independence Centenary series. On India paper mounted to cream stock card. Scalpel scores surrounding the image as shown.
| /Zeppelin cover from Cochabamba, Bolivia to Lorch, Germany via Brazil. Posted on 20th March with Brazil cachet in green, showing the 25c 5g letter rate plus 1b 50c uprated Zeppelin surcharge. Receiving mark and LAB handstamp to reverse. Light creasing at base.
| /The complete set in blocks of four, including airmails, from the Waterlow archives, all with security punch. Note, the 10c airmail is in two pairs.
| /Two blocks of eight stamps, being the 2c and 3c Waterlow archive file copies. The 2c value shows the print date, print quantity and file copy number in the upper margin. The 3c value showing partial file copy inscription only. Both blocks with security punch hole. Interestingly, although the printing was done on 1st December 1941, Bolivia did not release the issue until 1942, possibly because of delays due to logistical issues during WWII.
| /Both red surcharged issues in MNH blocks. Note how the depth of overprint is much heavier in the 11.5 x 12 issue.
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