If possible, you don't want to remove that bezel. There's tabs on the bezel that fold over a lip to retain the bezel/lens assembly and those tabs are pretty much a one-use deal. It's almost impossible to bend them away, remove the bezel and then bend them back to retain it again. They break off when you try.
A bit later I'll try to post a pic, I have an NOS 1966 tach head which comes with a bezel in the box.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
I just pulled a socket out. I can't read the number but I can tell by looking at it removed that it's a 168 or 194. Seems to me the 168 is one less candle power than a 194 but I'm going by memory?
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars