Turtle / Terrapin ID Please

This was in an enclosure with another species and according to the signage they were Asian Box Turtle and Red-eared Slider. This is not a Red-eared Slider so is it an Asian Box Turtle. Actually the other species also wasn't a Red-eared Slider so maybe it was the Asian Box Turtle?! Small zoo/breeding facility outside Chiang Rai. 11 Sep 13