Are you 100% sure those two watches are the same model, the same reference number?
Top, looks like a photo of date-wheel featured in the automatic movement (reference 123.20.38.21.03.001).
Bottom photo looks like a date font which Omega been using in the quartz movements.
Edit: Anyway I found the cited watch on ch24 and it has O8500. Sold in 2017, looks genuine but date font I can not explain.
View attachment 1175139
Click to expand...