keyhole

Azure, a keyhole voided within a laurel wreath, a chief embattled argent. Skeldergate, College of (1/1993 Midd)

Gules, a bend sinister sable fimbriated argent between a whip coiled Or and a heart sable fimbriated and bearing in its sinister chief a keyhole, both argent. Zarina Daeth (3/1978)

Or, semé of keyholes sable, on a chief purpure a heart argent. Katherine von Schlosserwald (6/1984 Midd)

Per pale purpure and argent, a pall between an open book and two keyholes all counterchanged. Kevan o Rathkeale (11/1985 Caid)