sorry, my pic kinda sucks. It's cold out there so i was in a hurry.

The dustcap has a very rough or irregular texture, not unlike the reverse side of many factory JBL cones, and they fade like crazy with just a little exposure to sunlight. While they're very faded, and the pic is way worse than mine, to me the DC's in the OP appear to have that same rough texture, not smooth like an Altec should be.

There's just something familiar about them, but it's not an altec familiarity to me.

PD 15