Hi Folks. Recently, I came across two insulators that I'd never seen before. The first is black glass (slightly amber in strong light) and marked ARMSTRONG (arc) 15-47 on one side, and 51-C1 MADE IN U.S.A on the other. The second a large, deep aqua "flying saucer" type marked Fred M Locke No. 16 on one side and Victor N.Y on the other. Any info that can be provided as to value - rarity of these two would be very much appreciated. Sorry, no photos yet. Thanks.