The mark would likely be etched !! Possibly on the underside of base but I have seen some that are into the pattern and darn near impossible to find !! Hawkes signatures are hard to find for me !! Get it in good light and look inch by inch !! Were you not told anything by the person that gave it ?? How tall is the lamp ?? Look at the wiring and that can tell a bit about the age unless it has been re wired to modern !! The electrical fixtures usually have a patent number and can help with the age !!
It is a gorgeous lamp !!