Standard Porcelain Insulators
Photos - page 2
#3 - #4
Standard Porcelain Styles (Drawings)
Standard Porcelain Photos page: 1 2 3 4 5 6 7 8
Standard Porcelain #3
#3-01: F; #3-02: N-N; #3-03 THOMAS
Standard Porcelain #3½
#3½-01: P P / 2; #3½-02: U S; #3½-03: F
#3½-04: F E P Co; #3½-02: G P Co; #3½-03: Triangle M
#3½-07: No. 3½ / DIEN01; #3½-08: P.P.Inc. / 3½; #3½-09: A.P. CO (top), 3½ (bottom)
#3½-10: E
Standard Porcelain #4
#4-04: F; #4-05: R. T. & S. CO.; #4-06: N-N
#4-07: diamond; #4-08: S P CO
#4-09: US (intertwined)
#4-10: N-N; #4-11: UPW; #4-12: N-N
#4-13: N-N; #4-14: N-N; #4-15: H F
#4-16: F. P. CO; #4-17: UPW with eagle's head (upsidedown) and an "S" in his beak.