Auction Series 257-264 in Zurich Day 4

Pacific Steam Navigation Company 1846 (April 22): Entire letter from Panama to Santiago and thus running the entire length of the service, sent unpaid with straight line with "VAPOR PERU / P" in yellow ink, transhipped and struck on journey from Callao with "VAPOR CHILE / P" in black. Closed cover tear on front with '3½' reales due in manuscript (1½ r. for sea and 2 r. for Inland). Very few entires are known with two Ship markings. Rare.
Catalogue 261: Stamp Issuing Steamship Companies