Strange 2405 thing...

[crossrunner99]

I was looking around on ebay when I found these tweeters with 2405 fronts, and something else on the back. any suggestions as to what they are? Maybe some sort of Frankenstein project?
http://www.ebay.com/itm/SLOT-TWEETERS-HIGH-POWER-EPITOME-JBL-SELENIUM-FOSTER-FERROFLUID-FILLED-/120959661190?pt=LH_DefaultDomain_0&hash=item1c29c1f486

[bstleve]

These are Acoustician clones :
http://www.audioheritage.org/vbulletin/showthread.php?18433-2405-UHF-Clones/page3
Cheers.
bstleve