Archived posting to the Leica Users Group, 1998/03/20

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Subject: Re: [Leica] Dual Range Summicron - Variations
From: Emanuel-Temp_Lowi@READERSDIGEST.COM
Date: Fri, 20 Mar 1998 15:26:50 -0500

Rumour has it that the cement used to join elements was changed/improved
somewhere along the line (I'm no expert on this stuff, but have heard
references to "Canada Balsam"). For this reason there is sometimes a
premium placed on lenses over #2.1 million. Then again, this may be another
mythical variation - but the "market" seems to value it. Go figure.