help with an unknown character

Hi -

any help with an unknown character - very appreciated:

                        elbrecht.com/SW.png [400KB]

On title of a 1932/33 book on the "Principle of Contradiction" -
a mathematical/logical character in use for book printing???

Thanks
Elbrecht

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  is proof that you don't.‹
Received on Thu Jan 10 2013 - 16:33:03 CST