Lot of 6 assorted Keystone View Company stereoview cards, slightly curved as shown but otherwise excellent. I've been told they started "curving" these in 1882 for additional 3D effect.  Includes Shucking Oysters Baltimore Maryland; Bank of Montreal; Harvesting Bananas Costa Rica; Plaza & Church of Santo Domingo Mexico; Beehive Cottages with roped roof Donegal Ireland; Sunday in the market at Amapola Honduras Central America. Please look closely at images for condition details.