I've got a few old reels of milk-chocolate brown 7-track tape here and was wondering if it's possible to date them accurately. The reels themselves have the Audio Devices name molded into them; the rear white flange is quite yellowed with age. The tapes have been used quite heavily as they've been shortened to much less than 2400'. I know that AD and EMI had a merger agreement with Capitol on their vinyl business around 1967 and that the result was spun off as EMI. That leaves the tape business. It seems that CDC acquired some or all of AD in 1969, but I can find no details. Does anyone remember these folks? They used to be *the* major tape supplier in the USA. --Chuck