Oyster Ladle

Of all the servers, the Oyster Ladle is one of the rarer. Given the sizes shown here, I'm not sure how one differentiates this ladle from all the other types. 

Royal Danish by International (9 7/8 inches)



Chantilly by Gorham (10 3/4 inches)



Francis I by Reed and Barton (11 1/2 inches)