Thrilling forum

I giardini del diavolo (1971) credited (top billing) as Lt. Bellings

Per una bara piena di dollari (1971) credited (featured) as George Hamilton aka the Nevada Kid

Quelle sporche anime dannate (1971) credited (top billing) as Tom Carter

Al di là dell'odio... (1972) credited (top billing) as Cervo Volante

Un bounty killer a Trinità (1972) credited (top billing) as Alan Boyd

La legge della camorra (1973) as Mike Artusi. Jeff reportedly has a featured "e con" credit, but the copy I watched was missing both opening and closing actor credits.
This would appear to have been Jeff's final film appearance. His sudden disappearance from the screen is a mystery waiting to be solved, he would have appeared to be a natural to segue into the police film fad which followed spaghetti westerns, but it wasn't to be. It seems rather strange that he would retire just when his career appears to have been going very well, unless there was some medical reason or scandal.

La colt era il suo Dio (1972) as Mike Jackson
and the credit for Sugar Colt

First found role for Cameron, surprising no one has seen him before in I criminali della galassia (1965) as Astronaut. He features quite prominently in the closing fight/escape sequence, but never keeps still for a second, hence the blurry shots.

Finally found Jeff in Il vendicatore dei Mayas (1965) as One of Manur's men

Ray Master, l'inafferrabile (1967) as O'Connor thug