Hi Guys,
I'm looking at buying some original 15 x 6 mags, 4 x 114.3 bolt pattern, from an Integra Type R. (Sample pic below.)

The seller has provided photos, but nothing from which I can determine the backspace or offset.
I've done an internet search and come up with +45 (mm) offset in one opinion and +48 to +52 in another. Anyone got any definitive numbers on these?
Thanks.
P.S. They would be going on a 1970s Mitsubishi which can handle up to a 6.5" mag, but a too big positive offest will lead to tires rubbing on struts.

 

They do say "15x6JJ 50" on the back of them, I would stab +50 based on that

 

Yes, that could be a clue.