I'm asking this for part of my friend, he has same across a lens with the following engraving mark & we have try to search around but fail to get what lens is this, hope someone here able to help us..

nasal engraving: 60
temporal engraving : D10
marking above those numbers will be two concentric circle...that's a "O" with a small "o" at the centre..


thanks.. :cheers: