Dang gt flying off the wall are we? LOL Sorry Taco, ya got drug into GT's ting here. Some of us know it all ol'farts lose our patience or don't GAS anymore, me included.
However, admittedly, that's the second time in about two weeks I got those colors mixed up. (apparently GT didn't notice the 1st time, [grin] but it was a Phantom) Opal, Radiant and Flamboyant. , But more importantly it's this year, 1958. I referenced the catalog when 1st replying and for 58 there is none. in 57 it's Opal skip then 59 it's Radiant.
"Misleading gt?? Not a chance pal.. However it is misleading to cite half a response: " Jeff it's not Flamboyant red" or incomplete statement directed personally, get over it. so, made me tink on first photo it might be, and turns out I were right, it's not purple, but purble. [grin] .
Yet without a catalog to reference, no other known information to discover , all you got is attempting to discern the differences between Opal and Radiant. I don't think there is much of a way except observation, and it seems, "seems" mind you, that Opal is lighter, a little brighter than your 'purble [grin] whereas Radiant, "seems" a little darker. Just a slight hint of a darker, deeper red, maybe some purble? .
But then, on the other hand, I've seen Opal reds turn gold. and yours does have golden highlights. I have not looked nor tried to discover if Radiant does too, so, I have no basses to confirm.
So, is it Radiant, or Opal? Perhaps the ultra violet radiation that can turn Opal's red tints into an much, much lighter, almost completely transparent red so the silver color underneath looks gold. is the answer. Or not, then, it's Radiant-Opalescent-golden -red-purble. .