Is it possibly a slab front with a routed edge and an applied mitered frame on the outside. The photo is not clear, but it looks as if the grain may be parallel to the short edge which would support this.
Maybe not, I enlarged the photo and the part on the left has the grain running lengthwise on the complete - maybe the OEM had a shaper bit that cut that large of a profile. But, if the profiles were "standard", you could get there by adding a mitered surround with the bottom half of the profile cut in it - that's how I would do it.
Maybe not, I enlarged the photo and the part on the left has the grain running lengthwise on the complete - maybe the OEM had a shaper bit that cut that large of a profile. But, if the profiles were "standard", you could get there by adding a mitered surround with the bottom half of the profile cut in it - that's how I would do it.