Green’s Dictionary of Slang

(UK Und.) a machine used to brand criminals on the hand.

1654		Witts Recreations Epitaph No. 111: Here Hocas lyes with his tricks and his knocks, / Whom death hath made sure as his Juglers box.
1703		Hell Upon Earth 5: Jugler’s Box, the burning Engine.
1788, 1796		Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.