This is a Barbie doll dressed in an elaborate, handmade, vintage-style crocheted costume, likely based on a pattern from the "Crochet Collector Costume" series by Paradise Publications. 

* The costume is a detailed, era-specific design, possibly from the early 1900s (Edwardian era). 

* The dress features a crocheted overskirt designed to mimic a heavy brocade texture. 

* It includes a large, matching hat and purse.

* These patterns were designed for 11 1/2" fashion dolls and were popular for collectors.