Hydraulic front brake
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
It is unknown if the brake functions any better (or with any less hand effort) than does the cable operated front brake.
I extracted this information from Kevin McMillen and Bruce Giller on the old Yahoo! Loopframe_Guzzi news group (which has now moved to Groups.io). In Bruce's own words:
A hydraulic front brake! He has reversed the lever so that when the hydraulic unit pushes on the lever (instead of pulling with a cable), the shoes will contact the drum. Kinda of ingenious.