Pls help identifying this Omega Constellation Quartz

Hello, By way of introduction - i am Viktaurian, a novice person, curating a watch collection for the generations to come.
I came across this Omega constellation quartz and seek your help to authenticate the watch. my main concern is the 4 screws seen at the back of the watch. While checking internet, i couldn't find any specimen having this type of case back.
the watch size is ~ 33 mm including crown.
Pls help me as i am keen to add this watch in my line up. I requested sellerto share the movement and inner case back pics, which he is unable to do as he would need to take watch to a boutique or specialist.

thanks for all your valuable help here

regards

OMEGA 1448.431

Thank you for your revert, I am keen to know if this is legit watch and not a clone, since I couldn't find any watches on internet having such case back with screws.

Thank you for your help. this makes sense now.
So can I consider this watch as an original constellation?
Probably i wont probe further, thank you again.