Green’s Dictionary of Slang

1. the number seven.

1893		P.H. Emerson Signor Lippo 54: Then he placed a large piece of boiled bacon and dish of greens before three road scavengers, and said, ‘I’ll take setta soldi from you gents’.
2019		P. Baker Fabulosa 297/2: setter seven.
2023		R. Milward Man-Eating Typewriter 4: In duey-chenta setta-daitcha-heksa junos (276 days, for those without the lingo).

2. sevenpence.

1859, 1860		Hotten Dict. of Modern Sl. etc.
1873		Sl. Dict.