Vintage DW3 Fashions, Inc. Grey Dress Union Made USA (No Size Or Fabric Details)

Great Condition, looks to be missing the little hook in the midseam(see pic) and only says Sz B and doesnt have a material tag. It feels a lot like wool but Im not positive. Pit to Pit is 16" Waist is 11" but has stretch Length is 45" Looks like it could have been some kind of uniform maybe