I picked this up from a listing that said it came from an estate sale and appears it came from the original owner with box, guarantee and even a little gift card. It is in pristine condition and the band is in great shape and looks to be original. It has a 10KGP bezel and stainless back.
For the ID, I am thinking Co-ed "A" based on the band and the ads. However, there are ads for Janet and Marie that look very close. In some ads you can see Janet has etching on the case and I came across one on eBay that I will post in the comments with the owner's permission. Marie also seems to have etching on the case and different lugs in a close up I found. In some ads they look identical to Co-ed. Will look forward to hearing what you all think. Thank you!