Cuevas del Drach, Porto Cristo (Mallorca)
Date of issue: 16 March 1964
Value: 1 peseta (inland letters up to 20 grammes, incl. possessions, Philippines, UPAEP (not USA), Andorra, Gibraltar, Portugal, and French border zone)
Colours: green and black
Format: 28.8 x 33.2 mm.
Perforation gauge: 13¼
Printer: F.N.M.T. (Fábrica Nacional de Moneda y Timbre)
Printing process: intaglio
Engravers: Daniel Carande Boto, Germán Martín Orbe
Number printed: 15,000,000
Edifil nr. 1548