I am no expert here
so what i have been looking at is this Sternkreuz from cousinsuk:
Rolex 116 (Ø300mm), Sternkreuz XS300.158
C19225
This clarks:
Crystal Ref. # 25-116 116 for Rolex "CLARK" crystals
and this one from the Ebay seller sabaec:
25-116 Rolex Crystal
https://www.ebay.de/itm/164143046857
Now the Sternkreuz is the only one with the correct bevel. However, as you can see in comparison, the cyclops is situated too far towards the center of the crystal. (And not as sharp and crisp as it is on the other crystals btw. Maybe the pressed XS302.450 version is better?)
Strangely the schematics on cousinsuk states that the span from the middle of this cyclops too the center of the crystal is 9,8mm.
In comparison to the Sternkreuz XS302.450 where the span is 8,7mm. So this one is even further towards the center and even more misplaced?
I sense that there might be a mistake? maybe its not nearer to the center but the other way around so maybe correct?
Has someone with a gen spec dial tried the Sternkreuz XS302.450?