I don't think I can help anymore but to say that regardless of whether your dial is original, it is from a different model. Don't think this makes it some sort of rare Omega because it's a mistake, the most likely explanation is that it will have been changed recently for the purposes of selling the watch.
I just took a photo with my upside down tumbler method and my Nokia TA-1020 phone - just about the cheapest smartphone you can buy in UK at about 80GBP. It took me 30 seconds and here it is (unedited). There is sufficient detail in this to remove anyone's concerns that it is a redial. If you want someone to confirm that you have an original Omega dial (but for a different calibre) then just do this.
Regards, Chris