I recently purchased a Little Golden Book that is written entirely in Spanish. The copyright is marzo de 1959 by Editorial Novaro-Mexico S.A. It is titled "Cuando Yo Sea Grande" (When I Grow Up - in English) I would say it is in excellent condition. The pages are white, not yellowed. No tears or writing other than in the name box on the front cover. There is a little wear on the corners of the cover, but the binding is tight.
My Spanish is not so great, but I think it says that it is the first edition, 30,000 produced in March of 1959.
I cannot find anything in any of the books/articles on collecting LGB about these one that were produced for Mexico. Any help you can give me in finding a value for it would be greatly appreciated. Thanks!