To create advantageous constructional conditions, it is proposed that in its nose piece the optical spectacle insert should have a through hole for at least one plug in projection of an attachment plug engaging in a plug in recess of {HEAD ~ the forehead side portion} of {TAIL ~ the sunglass frame}  
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To create advantageous constructional conditions , it is proposed that in its nose piece the optical spectacle insert should have a through hole for at least one plug in projection of an attachment plug engaging in a plug in recess of { HEAD ~ the forehead side portion } of { TAIL ~ the sunglass frame }
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