Does anyone have a WT 8 Amp morse key with P.O tensioner?
 

I was cleaning mine when this dropped out (see 2nd picture). It is clipped to the bottom of the spring tensioner. I doubt that it is original as appears to be steel and poorly made. It also seems odd that the key would be designed with a part that can fall out when the spring is slackened - I would have expected the spring to be passed through a hole.
The key is described as "WT 8 AMP No2. THREE BRACKETS. P.O. TYPE TENSIONER ON CENTRE BRACKET (TENSION SPRING)"
I would be grateful for a picture or description of the correct part.