Multisync monitor prior to 1981?

From: Vintage Computer Festival <vcf_at_siconic.com>
Date: Tue Aug 13 09:16:16 2002

Does anyone know of a multisync display that was in use before 1981?

Sellam Ismail Vintage Computer Festival
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Received on Tue Aug 13 2002 - 09:16:16 BST