help ID these Gillettes please

[Jboone78]

Just scored these from a lot my grandpa sent me but I cant pin down what they are:

Date code is C 4



this one I cant pin down either:

 

[Miesterio]

That appears to be a 1957 or a 1982 ball end tech.

 

[kcb5150]

Ball end tech and a single ring I guess.

 

[Pedro Navaja]

Gillette Ball-End Tech. Last quarter 1957? Someone more knowledgeable will confirm. Great Looking Razor!

 

[highball]

1957 Tech, Gillette Old Type