My 15" Rewind spokes are not straight, Those could be rewinds look very much like 15" ones, the 16" ones are straighter.
I didn't really explain what I mean very well there - straight probably wasn't the right word. They are quite "straight" when looking at them from the front. They are also quite rounded rather than oval in profile. Other wheels like the Panasports have quite an elliptical design to the spokes, emphasized by the shape they take depending on how they join the outer rim.
Rewinds are quite Watanabe/RKR like in that the spokes terminate on a flat surface inside the rim. Those in the OP's post seem to end on an angled inner lip like this, which is why I think they are Panasports (especially given the US origin of the photo):
I think those are Panasport centre caps in the OP's pic too - compare to the above.
*wheel spotter/pedant mode off*