The date window is turned like in a gen, rather than a rep. Where the tops of the numbers are pointing towards the handstack. You dont see many reps with datewheels like that.
I cant say that there are no Omega reps like that, but I dont recall seeing any. Of course better pics would be nice, along with the chronos reset.
Update: Nevermind. I checked a TD website and the quartz has a properly aligned datewheel but wrong color. I didnt see the 21j. I have never seen a 7750 version of this one.