A duplicate of the dress on the right was donated by Geoffrey Beene to the Metropolitan Museum of Art in New York in 2001. The accession number for that dress is 2001.393.98

The First: Black halter evening dress with black wool jersey bodice, black
point d’esprit waist inserts and full skirt with black pompons on skirt and horsehair hem. 
Label: Geoffrey Beene 
Inventory No.: 1472

The Second: Black sequin evening dress with panne velvet front yoke and sleeves, sheer black chiffon back bodice and panel above bust,
and point d'esprit insert at bodice and back. 
Label: Geoffrey Beene New York
Inventory No.: 1465

The First:
Approximate Flat Measurements Across Front:
Chest: 13"
Waist: 11"
Hip: 21"
Length (underarm to hem): 48"
  
The Second:
Approximate Flat Measurements Across Front:
Chest: 15.5" 
Waist: 14"
Hip: 19.5"
Shoulders: 15"
Length (underarm to hem): 25.5"
Sleeve (shoulder to cuff): 22"