Posted by jlb on February 21, 2003 at 08:53:53:
In Reply to: Re: Re: 5V Rotary Eb- German-Style? posted by Dan Schultz on February 20, 2003 at 23:37:05:
I'll second that opinion. I have been playing a 1970 183-4U for about two years and really like it.  I wrote to Mirafone about the 183-5U and was told it was out of production.  Apparently the 5th valve is/was in the lead pipe just before the first valve, just like the 5RV Mira's in current production.  The 183's are listed as having a bore of 18mm or .700".  I'd bet you could get a valve from Mirafone and have a competent repair person mount it with your choice of tuning slides and linkage.  Of course, you would have to find a 183-4U, first, and I'm not selling mine!  Go find your own!
John (eefer now for life) Breyer