TR4 Brake Rotor Thickness?

[CarlSereda@aol.com]

Hi List,
 
Anyone know brand new thickness on front brake rotors for TR4, 4-A, 250 and 6 
?

I know you can turn them down to .440" but I can't find anywhere what 
thickness they were as new (.550" ??)

Wondering if buying these two used ones with .495" left are worth it for $5 
each.

Carl Sereda
'63 TR4 since '74