These Lamb are close, but not an exact match.
L.A.M.B. Signature Collection Black/White Women's Gianira Shoe
There were so many oxford, wingtip, spectators last year that I lost track of who made what.
There's also a Zanotti version:
Giuseppe Zanotti E90150 at Zappos.com
You could also go to Modista.com & plug in any of the search terms: oxford,wingtip, spectator to see if there are any that are close.