Spanish Puerto Rico Covers, 1850-1870. Group of 38 stampless envelopes & fronts, mostly official, nice variety of postmarks in blue or black from Adjuntas, Aguada, Aguadilla, Arecibo, Arroyo, Caguas, Larea, Mayaguez, Ponce, etc; many handstamp or manuscript "A", various municipal seals; usual aging, some worm holes or acid ink erosion. Estimate  $300 - 400. $0