Is this Longines 150th ani ref. 5150 legit?

Hi fellow watch lovers. Please help me identify if this Longines 150th Anniversary ref.5150 cal. L976.2 is original? Especially the dial. From my searchs, the dials from most of the ref.5150 i found doesn't have a single one that match this exact variation. The only clue i found was in ref. 5156 but with different dial proportion, golden spade hour and minute hands and with watch's ref. no. right below the dial. Please help, all opinions are welcomed, thank you.