Lot
657 
Mexico, (Mazatlan) Cosala, sello negro wreathed cancel (Schatzkes 756) on 1864 folded letter sheet to Mazatlan, F.-V.F., this is my only known Sello Negro from Cosala. Estimate $200 - 300.
Sale 78: The Westpex Sale
State Postal Markings
Lot 657
Mexico, (Mazatlan) Cosala, sello negro wreathed cancel (Schatzkes 756) on 1864 folded letter sheet to Mazatlan, F.-V.F., this is my only known Sello Negro from Cosala.Estimate $200 - 300.