Vintage Birks Challenger Eterna Military men's watch , Manual wind , 15 jewels ,  Solid Stainless steel case and back , Very nice Rare black dial , Water proof , antimagnetic , sub second hand . shock absorbent, approximately 35 mm case size crown not included in measurement's , approximately 18 mm lug to lug  , Pre owned , few sign of wear , few scratches , overall good condition , working smooth , very nice Rare collector Military  Eterna .

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