U-1912 is the largest transposition in Worldwide Porcelain Insulators, measuring 5 3/4" x 5 3/8". The "S-43" under-glaze marking denotes this piece was made by Sunshine Potteries (located in Sunshine, a suburb of Melbourne, Victoria) in 1943. It is a new addition to my collection through a wonderful trade with Graeme Snell.

Thanks again Graeme!

Enjoy the photo.