Hi 

What was the original color for brake calipers on a 240Z '73 ?

look up a sales folder of the 240z.. i wouldn't know ... blackish? very dark grey?

I have try to find out this but haven't found anything yet.

Attached are a couple of images of a NOS caliper I have. Also attached is a scanned page from a Datsun 260Z brochure (UK issue), illustrating the front hub, and caliper. As far as I can see the brochure is undated, but the car on the front has an "M" suffix, indicating it was registered between August 1973 and July 1974 (also 1974 is mentioned in the brochure text).

 

 

Thanks Jerz for the pics👍

The illustration of the front suspension is early type showing the cooling fin on the rotor backing plate.  The rotors for that would have been the 'vented hat' style rotor.