Pictured here is a composit picture of an insulator that I believe is unlisted. It is somewhat lightly embossed on the name side and the No 19 is almost invisible. The other difference is that the A is missing the cross bar. The insulator has RDP so is like / similar to EIN [010] in that there is a C in place of the G.

I have had some discussion with other collectors and encourage more. Do you have one of these?