I know this is an old thread, but it's interesting ...
Silvestri T30.
Made by Italians; built in Florence; very specialized for architecture.
Advantages:
- stable shift mechanism with good range (equivalent to front rise)
- rigidity
non-pareil
- excellent portability
- Rodenstock & Schneider lenses on helical focus mounts
- lens range from ultrawide (35mm) to normal (150mm)
- 6x7, 6x9 & 4x5 formats on Graflok
Disadvantages:
- not an all-purpose platform
- you'd have to be very creative to hand hold this and shoot portraits, but ...