Antique 1898-1901 Keystone View Company Stereoscope Viewer Cards - Lot of 4 For Sale

Antique 1898-1901 Keystone View Company Stereoscope Viewer Cards - Lot of 4.3.5" x 7".There is one card from 1898, two from 1899, and one from 1901. Three are pictures from Alaska and one is from Niagara Falls in New York.Keystone View Company Manufacturers and Publishers. Copyright 1898, 1899, & 1901 by B.L. Singley.A great piece of history to add to any collection!
These cards are all worn and have water spots, tattered corners, and some small creases. One of the cards is separating a little bit. The pictures are still clear and easy to see.
Shelf 5 Row 3Labeled #4AE