Cricket wrote:
Thank you for the measurements, , from the case number , I guess it is from the  late 40s .I am not  really looking for a crown with a b on it . Especially so if it is  not age appropriate , just one that will  fit properly without compromising , or altering the case,  .  I also could use a contact  number for a trusted watchmaker. One  working  in the Washington D.C. area even better ,I know I`m asking a lot .
I’m sorry you are having trouble with what should be the simplest of tasks.  I would have thought that an internet search of “vintage watchmaker” should find something at least in your own state.  In my experience, these types of people have container full of hundreds of crowns they’ve collected over the years and will have one that  fits.  
The crown on mine sits proud of the case tube, and so even the issue of the crown fitting over the tube isn’t an issue.