I know that production 38mm Marzocchi Forks were available during 1976 in at least two versions. The limited production Puch MC250 came originally with aluminium legs for a few bikes and then the magnesium legs for the rest. The 38mm mmarzocchi forks were available as after market forks during 1976 but what other bikes had them as OEM fitment? The 1977 400 MC5 KTM?