Over on the Lansing/Audio Heritage site is a register of serial numbers. About 11000 units are registered, mostly JBL, with some Altec.

Is there a similar thing around for Altec?

[ame=http://www.audioheritage.org/vbulletin/showthread.php?t=24908]JBL Registry - Lansing Heritage Forums[/ame]

I also note mention there that Altec records for such things were lost in a fire. Is that the case?