I found a brown U-259 the other day at a flea market and a picture of that insulator is posted to this album. This white Fred M. Locke (#0-4) has been in my collection for several years and I had listed it in my files as a U-259 also, but I now realize it is the new listing U-259A. I hadn't noticed the difference until Elton Gish sent me a drawing of the U-259A and I compared the two insulators. Thanks Elton!