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Old 09-19-2005, 08:37 AM
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Tom Bavis Tom Bavis is offline
Audiophool
 
Join Date: Jun 2002
Location: Macedon NY
Posts: 371
Usually stamped on rear, top edge. Often pretty faint...

Look at "6-S..." models here: http://radioatticarchives.com/archive_z2.htm
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