#271 Router plane, 3"L, 1/4"W, 3/8lb, 1926-1973.
A handy, small router for light work. It's one of Stanley's better ideas, which gained favor from those doing inlay, mounting small door hardware, etc. The plane is a flat, rectangular casting, with a vertical portion at the midpoint that is used as a grip and to secure the cutter (by means of a simple slotted screw). There are two positions on which the cutter can be attached to the main casting. One position allows the tool to be used for normal work, and the other position for bull nose work.
Some guys would mount a block of wood on the tool by tapping holes through the casting (in the vertical portion, where you grip the tool), and then screw the wood to the casting. This after-market option was done so that a better grip could be had on the tool.
The plane is nickel plated, and is still manufactured over in England. A short production of japanned models was offered during WWII. These are very scarce, but no one, as yet, cares.