Well, we do know accurately when the G4 was introduced on production mowers! Late-ish 1975, for the '1976 season'. Here are the Victa Tech Bulletins from then: https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=38908
Cheers,
Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
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