I suspect she is not a Welsummer.
The leg color may not be an indicator--although they should have yellow legs, I have had one who'd legs were very bleached out by the end of the laying cycle (my best layer) so it could be timing and the photo--what color do you think her legs are?
I think it looks like she has partially white earlobes, Welsummers should be red and I have not seen one with white (its a DQ). Her coloration also seems warmer than the typical Welsummer's should.