Type 1. Number 1399P. 8 5/8" x 3 3/8", patented
Sept. 26, 1907.
Type 2. Number 1399P. Same as Type 1, except that at some
point Preston changed the casting to allow for blade mounting
on the inside or outside of the router handle post.
Type 3. Number 2500P. Like the 1399P, but with a
throat closing device and moveable fences (left and right), added in 1912.
Type 4. Number 1397P. 4 1/8" x 2 1/8", patented
Dec. 12, 1909, and has patent number 534,243 cast into frame.
The Preston trademark or logo was called the Birds Eye. The logo
started in 1870 but was not registered as a trademark until 1876.
Type 2. Number 1399P. View with cutter mounted on outside
of router handle post.
Type 3. Number 2500P. Views of movable fences.
Last modified: April 15, 1996
Jay Sutherland, firstname.lastname@example.org