I bought this ballast and the guy I baought it from had 150watt bulbs in it!!! Then I showed my pops and he said they can run a 250watt bulb in it??? Is this correct here's a pic...
Without a model number on the label you're going to have to take the cover off and get the model number off the coil. Take that to Google and see what you come up with. Looking at that switch I'd say that's a pretty old ballast.
Ohhh ya man I luv the old school he had newer stuff but these older models IMO last almost aifetime that's why it's still here I have owned newer models and some have actually cought on fire these older ones (Im thinking this is one of them) were built more heavy duty!!!!