| /Three rouletted color trials in dark green, brown and brown-orange. On gummed paper with hinge remnants.
| /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.
| /Believed to be printed for supply to the UPU and may not have been regularly issued (hence no pricing for used). Hinge remnant and mild toning.
| /20c Transportation issue OFICIAL genuine 16.8mm x 3.2mm overprint on unwatermarked paper. Hinge remnant, original gum with some disturbance.
| /Choice upper-left corner marginal example with superb centering, also showing security strips and revised plate numbering. Ruidiaz expertization stamp to reverse.
| /Only 1,500 copies printed. Whilst MNH, light gum disturbance/offset is noted. Pencil notation. 2011 MEPSI certificate.
| /1932 Air Mail Officials with SERVICIO OFICIAL overprinted on to C11 and C12. Immaculate gum.
| /Unmounted mint example of the 'OFICIAL OFICIAL' error, which should read SERVICIO OFICIAL. Not easily found MNH.
| /60c Barril on Carranza monogram issue in red ink. Good gum, shortish perfs to top left, small amount of red ink offset on reverse. 1983 MEPSI certificate.
| /Ten peso value in the distinct carmine shade with excellent centering. Hinge remnant and small corner adhesion to reverse (no evidence of repair). Pencil notation. Only 300 copies estimated to be printed; a key stamp of Mexico. With 2009 Behr certificate stating: '10p Red well-centered. Rare for this stamp.'
| /Boxed San Juan Del Rio (a very small town, back in the day) cancellation in red on Scott 3. Entire embossed with Republica Mexicana eagle. John K. Bash handstamp on reverse.
| /Infrequently available as MNH singles. Excellent centering. 20,000 copies printed.
| /Infrequently available as MNH singles. Excellent centering. Only 10,000 copies printed.