A couple of things. The nylon rod in those tend to bow over time. The side key is not fully closing the relay. Also, same as you. I thought the double key was TUG 9. But I have come across ed a couple with factory sicker on them, that only have the side key. They are marked TUG 9. If you look at the boards in them. They are different than the TUG 8.
Legacy LostI’m not sure it doesn’t even work intermittently so whatever it is is a broken heart or a cold solder joint. I hate to take it apart to do with it as long as it works at all. Hey thanks for watching as always my friend