Green’s Dictionary of Slang

1. faces.

1960		J. Franklyn Dict. of Rhy. Sl. 31/1: airs and graces [...] (last quarter 19C.) it meant (3) faces.
1969		S.T. Kendall Up the Frog.
1971		‘Jack Jones’ Rhyming Cockney Sl.
2002		D. Shaw ‘Dead Beard’ at www.asstr.org 🌐 Then I look a bit higher and cop her boat race and I know I’ve seen it before – I never forget any airs and graces, you can’t afford to, not in my business.

2. (also pair of braces) (Epsom) horseraces.

1944		Maurer & Baker ‘“Aus.” Rhyming Argot’ in AS XIX:3 190/1: Pair of Braces. The races.
1960		J. Franklyn Dict. of Rhy. Sl. 31/1: airs and graces [...] In the first decade of the century it referred to (2) Epsom Races.
1969		S.T. Kendall Up the Frog 38: Pair o’ braces – Races.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl. 21: airs and graces 2. Epsom races (early 20th c.; obsolescent).

3. braces (US: suspenders).

1932		‘P.P.’ Rhy. Sl.
1969		S.T. Kendall Up the Frog.
1971		‘Jack Jones’ Rhyming Cockney Sl.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl. 21: airs and graces. 3. Braces (after 1918).
1998–2002		G.D. Smith Cockney Rhy. Sl. 🌐 Airs and Graces: Faces [...] Braces.