Professionally packed for fragile shipment. Ships next business day. Full refund if damaged in transit.
This is an Armstrong DP-1 clear glass insulator in exceptional crystal clarity — a style that serious collectors specifically seek out. The DP-1 designation refers to Armstrong's double-petticoat design, manufactured in the mid-20th century for telephone and power line applications across the United States. Armstrong insulators in true crystal clear glass, free of color wash or tint, are among the most desirable in the CD classification system.
