SO how much is a metal head viper white max weight with blue metallic stamp that has zero engraving on back worth? Yeah it does say anything, its blank. No patent number or innova address. Just a pure white back.
Nothing on the back is a first run/proto viper not a metalhead
The metalheads were super overstable w/a flat top - probably 3rd run vipers that came out about a year after the blank ones.