These are early Victor suspension insulators made by Locke at Victor, NY from about 1910 to about 1922. Note the letter "P" to the left of the marking. One insulator is brown and the other is bluish-gray. The gray ones are known to have been used on a line from Roosevelt dam to Mesa, AZ. The dam was completed in 1911. Note, took, the very thin petticoats and the large cast iron metal cap.