Just a good old fashion saw blade clock.
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Looks like the “IPT/PTM” style?
I recall it using a retaining cap (the light grey), nozzle, and electrode.
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Yes the gray cap. There’s no sheild. Should I use one? @TinWhisperer
As long as there is a shield ,retainer, or deflector.
Hard to tell in the picture
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Definitely there, it’s just dirty from use (like a real table should be)!
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