(front skirt) number / E.S.A.

3 3/4" X 4" (95mm X 102mm)

(rear skirt) R.E.N.F.E.       

Picture courtesy Richard Wentzel

3 3/4" X 4" (95mm X 102mm)

(front skirt) E.S.A.    

(rear skirt) C.T.N.E.

Picture courtesy Richard Wentzel

3 3/4" X 4" (95mm X 102mm)

(front skirt) 8 / E.S.A.

(rear skirt) C.T.N.E.   

Picture courtesy Don Mecklenborg

3 3/4" X 4" (95mm X 102mm)

(front skirt) "E.S.A. blotted out"

(rear skirt)             75              

Picture courtesy Richard Wentzel

3 3/4" X 4" (95mm X 102mm)

(front skirt) TRANSMISIONES

(rear skirt) ASTURIAS              

Caleb Thimell provides the following additional information:  An official Spanish military division repaired old power lines in the small region of Asturias that were destroyed during the country's civil war from 1936-39 using these insulators. First insulator that can be attributed to have been made by Gijon Fabril

Picture courtesy Bob Berry

3 3/4" X 4" (95mm X 102mm)

(front skirt) E.S.A.             

(rear skirt) J.T.E.-F 60103 

Picture courtesy Richard Wentzel

3 3/4" X 4" (95mm X 102mm)

(front skirt) number / E.S.A.

(rear skirt) R.E.N.F.E.       

Picture courtesy Richard Wentzel