Backside of 1926 Spain Alfonso XIII definitive stamp

Spain · 1926 · Unknown

This image displays the backside of a 1926 Spanish definitive stamp, featuring a clear postmark and the gummed surface. The front of this Michel 287AcI stamp typically depicts King Alfonso XIII.

Issued during the reign of King Alfonso XIII, this stamp belongs to a definitive series common during the Primo de Rivera dictatorship in Spain. Such stamps served as standard postage, featuring the monarch's portrait.