I have handled several Ducati (cameras...) over the years but never had that I can remember one in very good condition. The one your brother is holding looks mint. So a very nice collectors piece.
Well I wish..
Rick was correct . It is this one :
THE Ur Leica, one of three made by the "father" of the 35mm format , Oscar Barnak.
All three were slightly different , therefore they are truly unique.
They were all made around 1913 and from them a production model was made in 1923
The first production run was of 25 cameras and one of them was recently sold for about 1.9 million dollars.
Of the 3 UR Leica (Ur means original in German) one disappeared and there is no record of it (however I was told by the Leica Museum curator how it differed from the one they have) the other was a few years ago in the hands of a Japanese collector (according to Leica) and the one in my hands is stored in a bank vault in ... (I'll tell you another time)
and some more info here :
So for a few minutes I had in my hands possibly the most expensive camera in the world as well as a piece of history.
(BTW, I fired the shutter a few times changing shutter speed too, some of my colleagues panicked and the Leica guys smiled nervously. But it does still work...)
By that stage I had in my pocket a pre production sample of a new compact camera that a Panasonic division had just made.
I spotted that one going around the fabric the day before and asked if I could test it. The product manager from the Pana factory (called then Western Electric) was there personally to talk business with the Leica people so I got a chance to talk to him too.
(I was a guest at Leica for 1 week)