It was very common. 202 had huge stretching issues on 1" audio transports and acetate edited much much cleaner. Bob Olhsson Audio Mastery, Nashville TN Mastering, Audio for Picture, Mix Evaluation and Quality Control Over 40 years making people sound better than they ever imagined! 615.562.4346 http://www.bobolhsson.com http://audiomastery.com -----Original Message----- From Richard L. Hess: "...I suspect this is something like 3M 201 "Dynarange". Was this common? I would have suspected 202 would have been the more likely choice.