Chile 1857 5c red-brown on blue Colon Folded Letter CURICO Straight-Line

Folded letter, with contents datelined 1857, franked with 5c red-brown on blue, Perkins Bacon Second London Printing, large margins on top and bottom, postmarked with black target cancel, to Santiago, struck with red ideal strike of red CURICO straight-line, light filing fold clear of adhesive, a quality strike.