I don’t have tool to open the case back
Hard to say from the pictures. I did try to blow them up but couldn’t make it out. That being said the layout does match a 2671 (have a look here).
But I wouldnt be investigating or purchasing either until you are 100% certain what is in it right now. Sellers pictures are old and n/a to your decision making at this point in time.
So perhaps, if you cant get it off yourself, a trip to an independent jeweller, give $10-$20 approx and ask them to remove caseback for you. Very simple job.