Spanish Pro Union Iberoamericana stamps

Anil, there's an interesting story behind these stamps. According to the Scott Catalogue, they were privately produced for the exhibition and the promoters presented a quantity to the Spanish Post office who placed them on sale and allowed them to be used for three days. Reprints exist and have blurred colours, yellowish paper and inferior, almost invisible gum.

The original printers retained the printing plates and likely printed and sold further quantities over the years, also producing deliberate errors.

Daniel

I'm not a serious collector of Spain's stamps but I do have a wooden walking stick. Here is a possible reprint of the ultramarine, 25c value (Scott C52) that is in my possession. My inventory indicates that I have two other values from the Spanish-American Exhibition issue but my back has failed me, yet again, and it is too painful right now to pull out the album to verify.

I'd agree with cursus,
Issued 30th September 1930  at Seville
Privately produced
The Spanish Post Office agreed to sell a certain quantity for 3 days  (or so the story goes)
Inverted Lindbergh,   The cat is "Patsy"  Lindbergh's cat, not taken on flight.
Information from various sources, hearsay etc.

One missing from the above examples
The 50c SIDAR. (Mexico)
(Not Mine)

Apparently a set of 8.    2 values missing. (1c  and ?)





Bill Hornadge Catalogue (Australia)

At the risk of contradicting the great Bill Hornadge, this stamp was printed in one colour and so there was no need to have a separate printing plate for Lindbergh's head. Moreover, if there was a separate plate the inverted head would be over the cat (and such examples do exist). This stamp could only have been created deliberately and some time after the original version. 

Daniel