Hello there!,
I had to become a member after I stumbled on this site after I dug out the Nagra III that was given to me by a friend, long time ago.
I fall in at page 32 of this thread, where there is a rather elaborate analysis of the serial numbers...
I look on mine, and I see this: B5809.
Would it be possible that I have something like the No.9 Nagra III??!?
Now my unit is some sort of FrankenHack... it has been retrofitted with pilottone (and scars), had some switch added for oscillator tone, extra banana jacks added.
It runs, but it need belts, and rubber ring that's fitted on the servo wheel to drive the supply reel (rewind). Plus the rubber around the top plate is all hardened and brittle, and is coming apart. Not sure it has much historical value...
One Fine Day when I get free time, I'll take photos and post them here.