benrus. eta

Hello- Looking for a little advice. I picked up this Benrus Bullitt from a thrift store and just dropped it off for service. My gut tells me to leave it all original, but cleaner. I know that's the general consensus with the dial on vintage watches. But what about the hands? Should I have...

I have collected a number of vintage Benrus watches and I would like to know more about them based on model or serial number. Does anyone know of a data base or a direction to take in order to gather this tyoe of data? So far I have found very little on the web or in books.