Simplicity Tudor Costume Pattern 4508 Size KK 8,10,12,14 UNCUT
Elizabethan gown,Victorian Costume Women's Dress
Here is a site to Help with Sizing if you need a bigger size once pattern is ordered.
The Envelope shows some wear,and a black marker slash,see photo but the pattern inside is Mint.
https://mellysews.com/2014/09/make-sewing-pattern-bigger-smaller.html