Masi’s Volumetrica frame was innovative and unique in the way that the lugs fitted snuggly inside the tubes. Using thin walled, larger diameter tubing enabled Masi to think differently and create a custom lug that the tubes slotted over. A ring of silver, between the lug and the frame, was then heated and when the silver melted, it flowed into the gap between the joins. The internally lugged method produced a very stiff frame, the thinner tubes granting a reduction in weight that’s made up by the slight increase in tube diameter.
Lookup Serial no. 9095 @ Masi Registry USA