Sterling Silver cup "CSCRC" duck retriever dogs 4th derby spring 1957

Description

For sale a Sterling Silver cup "CSCRC" duck retriever dogs 4th derby spring 1957.
The cup is 3.5" tall and 3.25" in dia. at  the flared top.  It weighs 5 oz Av.
The image is applied to the cup  and the writing is engraved.
I cannot find what "CSCRC" stands for.
The cup is in very good condition.