Issued to pre-pay single weight overseas postal rate. Engraved by Jose Perez Varela and printed on rough, medium to thick bluish wove watermarked "loops" paper. Typographed by the Fabrica Nacional de Moneda y Timbre, Madrid, and issued in sheets of 170 subjects. 

The stamps were issued simultaneously in Cuba, Porto Rico and the Philippine Islands and their usage in the Philippines is only distinguishable when tied with Philippine postal cancellations.

Single Weight Cover

1857 AUGUST 2: MANILA to MADRID
Parilla and Small Baeza Circular Date Stamp
San Roque - October 2, 1857 and Madrid - October 6, 1857 Receiving Postmarks