This strain came from an antique shop in the Seattle, WA. area in 2008 . It measures 3 1/4" long by 2 1/8" wide.

Photo #2 - To see photo #1 [id=245937715]

It has two embossing marks which are: " Whites" and a model number, probably a 504 or 506.

This design was patented by Tomas C. White on January 20, 1914. White also patented another strain design on March 17, 1913

Thanks to Robin Harrison and Joe Maurath, Jr. for the probable model number and Elton Gish, for the patent. info.

Here are the links to the patent drawings:

http://reference.insulators.info/patents/detail/?patent=D45172

http://reference.insulators.info/patents/detail/?patent=D44118