This isn't a definitive answer but if I was gonna take an educated guess based on what you've posted so far I'd say it was:
Watson Pharmaceuticals
Clonazepam 1MG (aka
Klonopin)
Imprint: Watson747 / Scored
Color: Aqua
Shape: Round
Source:
http://www.pharmer.org/taxonomy/term/7
That doesn't exactly fit your description though (i.e. You said Oval and these are Round. These say Watson [Which could be the W you were speaking of...]. And these are scored on one side [That means it has a wedge so you can split them.]) This was the closest thing I could find to what you were talking about... But I'd let a more experienced member respond before you ground your daughter for having Benzo's...