18k gold C-case Connie 751 cal. hallmarks?

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Just want to confirm that all c-case 18k gold connies should have a gold hallmark on the underside of one of the lugs?
 
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Just want to confirm that all c-case 18k gold connies should have a gold hallmark on the underside of one of the lugs?

A Swiss made case has to have two hallmarks on the middle case (so not on the caseback or on a loose bezel) and they are typically on the back side of the lugs or on the side of them.