Perfect Weller OEM replacement; new. TC207 can work for Weller MP-101 switch MP304 as well.
The Weller TC207 switch & light for TC202 was an OEM replacement with OEM packaging and instructions. While it was manufactured as a drop-in repair part for TC202, I used it to replace the switch & light assembly for a Weller MP101 power unit, replacing Weller switch & light assembly p/n MP304; it is functionally the same switch only with wires instead of male fast-on terminals.
Use in the MP101 required snipping two female fast-on terminals off the power unit's switch wires, stripping the insulation ends, and using two wire nuts for those connections The extra wire nuts were not included, of course. The switch had to be rotated 180 degrees, swapping the positions of the switch and light, so that the switch is pushed on the top of the rocker to turn on.