has probably gone through many hands and changing fortunes.Some were showered with attention by their former owners, others suffered the worst possible abuse.The holder consists of a captive lever cap, which is fastened to another casting that pivots at its bottom, located above the tool's mouth.
I have just scrolled throught Patrick Leach's Blood and Gore, and nothing really matches, but it seems closer to a 220 or 203. The front knob which appears to be black plastic was originally brass. I've been trying to figure out which ones to put on ebay - I'm guessing the 220A probably won't be worth it. I have 4 9 1/2's, so I will probably ebay a couple of those instead.The two castings are attached to the main casting with a rod that is visible from, and ground flush to, the sides of the tool.The rod is driven into the main casting from one direction only so if you have to drive it out, and it's not budging, flip it over and drive it from the other side.There are detailed type studies available, usually starting with type 1 for the first model then going up with every little or major change.Four categories seem sufficient to describe and roughly date a plane: Pre-lateral for any plane that has no side adjusting mechanism for the cutter, low knob, SW model or tall knob (SW stands for Stanley Works but is usually called Sweetheart) and late models for WW2 vintage and later.