>http://www.wuml.org/history2.php The first console shown is a WECo 25B. The console shown at the bottom is a WECo 25A. In the early 1960s, Altec-Lansing did a greatly modernized version of the WECo 25B, which it called the 250A. Same exact profile, but all new, completely push-pull, very low-noise amplifiers. Where I was formerly employed, we had a half-dozen 250As.