You can see notes on the back of the photo, see back scan. Very interesting and from ABNCo publishing file for the 1953 issue. Looking at the signoff dates this may have been the last piece of production prior to the creation of proofs (just a guess).
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The proof is a raised proof constructed of photos or small engraved parts put together. The back is filled with ABNCo markings and stampings. The back flip cover has a small tear at top but really doesn't detract.
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I would have never guessed this series was modeled after a KGV Jamaica issue, but here is the proof with THE original stamp used to model the vignette. You can even see the production file number written on the back of the stamp tying it to the letter and original photo of the president used for the vignette.
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Salvador. 1 Colon 150ième anniv indépendance 1971, neuf, magnifique patine.
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Sent during the US intervention period, as per scans.
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