antedating of "off-kilter" 1929

[Sam Clements]

M-W has 1944.  OED doesn't have, but cites "out of kilter" well before this.

12 Feb. 1929  Frederick(MD) Post  4/5

<<There is a definite depression about them that one knows instinctively will be continued upon entering.  One knows instinctively that there will be a battered, scruffed bit of rug running up the stairway; that the stairs will be a bit off-kilter; ....>>

Sam Clements