Scooterotica

Have a set of late sx\li forks with push in rubbers and the big cup (as sx/li) and loose ball (as gp) links does anyone know what year chrome ring forks ended with bolt in buffers and push in ones started , ive only previously had the same fork rubber/ link combo in late sx 150 or my old s4 125 but innon chrome ring
the forks are innocenti marked and have not been welded any were , I only ask as ill be selling them soon and want to give as much info as possible

Innocenti chrome ring frames finished in '65 but push in buffer type forks didn't appear to about late '68.
The forks for either non or chrome ring are the same, in other respects.