Best Of The West Live Auction (November 13, 2026 5:30 PM PT)

Circa 1870–1878, CD 123, A Mold, 4 1/4". Another EC&M insulator, this time in a deep cobalt and a different mold. EC&M molds differ in several identifiable features, including dome and skirt shape, embossing size and style, ampersand form, wire groove characteristics, seam lines, button placement, and the presence or absence of slug plates.

Description & Condition: Exceptional deep cobalt blue. Excellent condition with only minor chipping on the skirt.

Min. Bid $1,500 - Est. $3,000–$6,000