Vintage Gillette components

[David6Eagle]

Looking at a couple of Gillette New razors with limited descriptions on ebay and comparing to pictures on Mr-Razor in an attempt to more accurately identify. I'm confident I'm looking at open comb new heads, but handles are different than Mr Razor. Do Tech handles fit New heads?
Thanks,
David

 

[tsv]

Tech do indeed fit. Since the older handles tend to crack, they often get replaced by newer Tech handles.

 

[cooncatbob]

Almost all 3 piece razor use #10-32 threads and are interchangable.
Those that don't are usually European and use the slightly larger
metric M5 X .08 .