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TIE SLIDE RULE ( 6/8" / 41 mm Scales )
TIE SLIDE RULE = KRAWATTEN-KLAMMER-RECHENSTAB
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On the back side is engraved:
VERNON (= Manufacturer ?) & STERLING (= Silver ?)
impressum:
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© C.HAMANN http://public.BHT-Berlin.de/hamann 08/03/07