Pin Bases
Fred Locke invented the pin base to strengthen the steel pin. His first pin base was a small cast iron base patented March 14, 1893. Only one example is known with the cast marking: F. M. Locke Pat'D Mch 14 93 Perhaps a dozen unmarked ones are known.
Page from 1895 Fred Locke catalog (left) showing the cast iron pin base and page from 1904 Fred Locke catalog (right) showing various brackets incorporating the pin and cast iron pin base.
Dry Process Porcelain
N-N Fred Locke found with white M-2332, 2-5/8" x 3" tall
Triangle M (embossed on shoulder), 2-1/2 x 2-7/8" tall
2-5/8 x 3" tall
3" x 3-3/8" tall
4106 (recess-embossed on bottom), 3" x 3-3/4" tall
3-1/2" x 5-1/8" tall
4-1/2" x 6" tall
3" x 6" tall
3-1/2" x 6" tall