Upon the date 05:57 PM 6/15/01 -0600, Will Jennings said something like: Yep. Back in the 70's and early 80's the company I worked for was the Analytical Systems Division of Bausch & Lomb (which became ACU-RITE Incorporated in '83.) We made the linear encoder scales for your dad's product. -Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.antiquewireless.org/