U-1991: England
3 5/8" X 6" (89mm X 147mm)
(upper skirt) LATIMER, CLARK, MUIRHEAD & CO. LIMD / LONDON
Picture courtesy Elton Gish |
3 1/4" X 5 1/2" (80mm X 135mm)
No markings
Picture courtesy Bob Berry |
U number assignment from Worldwide Porcelain Insulators by Marilyn Albers & Jack Tod.