Green’s Dictionary of Slang

Gordon & Gotch n.

a watch.

1960		J. Franklyn Dict. of Rhy. Sl.
1971		J. Jones Rhy. Cockney Sl.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 10: They were all wearing Mickey Mouse Gordon and Gotches on their Warwick Farms.
1999		G. Seal Lingo 89: Other examples of this process include: [...] fred astaire lair; gordon and gotch (wrist)watch, after the name of a well-known newsagents’ distributor.
2001		D. Looser Boobslang [U. Canterbury D.Phil. thesis] 80/2: Gordon and Gotch n. a wristwatch.