Super vibrato, very well studied in a rock-solid.
Basic steel, stainless steel adjustable saddles, stainless handle "simple push
Very good tuning stability, sustain great
The knife plate lets you mount studs anywhere from 53mm to 62 mm
It mounts on a Start is a 2 pins without modification.
On a vintage model has 6vis, you just enlarge the holes farthest.
Several models are available, but prefer the "Made in USA"
On the early models could have set the space between the strings and setting the virato was a very strange design and impractical.