WWII FRENCH PRISMATIQUE LUMINA BINOCULAR 8x - with ORIGINAL CASE FRANCE WW2

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WWII FRENCH PRISMATIQUE LUMINA BINOCULAR 8x - with ORIGINAL CASE FRANCE WW2.
The lens are clear but I couldnt get them to focus perfectly. I have a problem with modern binoculars so it might be me. Ive had these for years but dont know much about their origin. please look at photos closely, the one eye piece is cracked as seen in photos,  no returns