Joseph R. Lasser and Jorge Emilio Restrepo. Translated by William L. Bischoff. HB. New York, 2000. 150 pages, illustrated throughout. 172 x 254mm.
Originally published in spanish in 1998 as Macuquinas de Colombia. This book on the gold and silver cobs quickly became the standard reference on the subject.
Some folk on the internet seem to ask as much as £330 !
This example, almost as new has no dj (as published).