Green’s Dictionary of Slang

1. a male servant.

1822

Tom and Jerry; A Musical Extravaganza 55: Saucepan, a man servant. Pannican, diminutive from saucepan.

2. 5/-, a crown [? joc. resemblance to a SE crown].

1921

Illus. Police News 27 Oct. 2/2: The Chairman: What is a saucepan? Witness: It is racecourse slang for five shillings.