Art Nouveau/Art Deco Lamp

I got this lamp at an estate sale because I just loved how unique it was. Has anyone seen this lamp before? I have seen similar lamps by DAV Art New York and Joseph B. Hirsch, but I can't find any stamps or marks on this lamp. Does that necessarily mean it is a reproduction? The head doesn't fit the figurine perfectly (small space around neck, see last pic), yet if fits the style of the lamp and the clothes the figurine is wearing. Is the head original? Any information is appreciated. Thanks!