Quote Originally Posted by Softie View Post

My 23cII dual dichro head takes a 250W 82v EVW bulb. At least that's the bulb that was in it when it came back from Beseler service.

It might help if you tell us which version of the 23 you have, as I think that heads are not completely interchangeable in that series.
Here is a manual showing the 200w bulb. Though, thats not to say they did not make any changes during the period of production. If I were uncertain I'd go with the lower wattage, though, an e-mail to Beseler service would probably give the correct answer.