Anyone recognize these beauty's? These were the first big Altec I ever bought over 15 years ago and I just got them back today. They are loaded with a 415C and a little 3000 (R)? horn tweeter. I remember at the time not knowing what model they were. I have gone thru the library here and all my Altec literature with no luck. They are 28 1/2 H X 24 W X 18 D