For those of you interested here is some information I received from a person at Dick Blick who was very helpful:
Our notes state that Eagle existed in 1970 in our catalog.
In 1980, Berol became Prismacolor.
Design Spectracolor was in the following years of our catalog:
1992, 1994, 1996, and 1997 as the last year it was in the Blick catalog.
For information on Mars/Venus products, you may wish to contact
Staedtler Inc. at 1-800-776-5544.
For information on the Faber Castell products, you may wish to try contacting
them at 216-643-4660.
Product Information Team