Yellow and grey dots

From: Gerrit Heitsch <>
Date: Sat, 03 Dec 2011 12:58:34 +0100
Message-ID: <>

when looking through my collection, I notice that there are yellow or 
grey dots on some of the older MOS-chips (up to 1985 or so). They are 
usually (not always) on the side where pin 1 can be found.

Anyone here know what theses markings indicate?


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Received on 2011-12-03 12:00:03

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