Green’s Dictionary of Slang

wedge adj.

[wedge n.1 (2)]

silver, silver-plated.

[UK]C. Hitchin Conduct of Receivers and Thief-Takers 15: A Wedge Lobb, alias Gold or Silver Snuff Box.
[UK]Key of Pierce Egan’s Trip to Ascot Races [printed panorama] [T]he slouched castor, the open breeches at the knees, the short jacket, the fogle loosely twisted round his squeeze, the large wedge broach, the long quartered shoe and silver buckles, the bit of myrtle in his gig, and the cut altogether of a ‘rolling kiddy’.
[UK]Egan Finish to the Adventures of Tom and Jerry (1889) 175: as 1827.
[Aus] glossary in Occurence Book of York River Lockup in Seal (1999) 37: Was a mushroom faker, has been on the steel for snamming a wedge sneezer so I must hoop it.
[UK] ‘Autobiog. of a Thief’ in Macmillan’s Mag. (London) XL 504: I guyed away to Malden and touched for two wedge teapots.
[Aus]Morn. Bulletin (Rockhampton, Qld) 16 Aug. 3/3: I claimed two wedge spoons, and was just going up the dancers when a slavey piped the spoons sticking out of my skyrocket and I got smugged.

In compounds

wedge-feeder (n.) [wedge adj.+ feeder n. (1)]

a silver spoon.

[US] ‘Flash Lang.’ in Confessions of Thomas Mount 18: Silver spoons, wedge feeders.
[UK]Vaux Vocab. of the Flash Lang.
[Scot]D. Haggart Autobiog. 69: I got a scout, some wedge-feeders, and a pair of boots.
[UK]H. Brandon Dict. of the Flash or Cant Lang. 166/1: Wedge-feeder – silver spoon.
[UK]G.W.M. Reynolds Mysteries of London III 85/1: Three wedge-feeders, a yack, and a dee .
[UK]Hotten Dict. of Modern Sl. etc.
[UK]Hotten Sl. Dict.
[Aus]Sydney Sl. Dict. (2 edn) 9: Wedge Feeder - Silver spoon.
[Aus]Crowe Aus. Sl. Dict. [as 1882].