They are not EV -- or at least if they are, EV changed their basket tooling. The terminals should sit on a sort of "bridge" between two basket spokes, not on that square cast tab. The spoke profile is similar to EV's but not identical. The magnet back plate doesn't have the proper holes for mounting EV's famous finned magnet cover.
The "15B" cone appears to have a progressive surround, which again may be a newer EV style but not one with which I am familiar. The "15L" cone has a double half roll surround, which is also incorrect, but you already knew it was a recone.
PAS used to make some similar looking speakers, but I think most of that series had 3" voice coils instead of EV's 2.5". Regarding the basket design, more recently there is a flood of Asian-sourced knock-offs that use what is basically open tooling.
It would be fun to cut up one of the ones you have and take a closer look inside.