Brewer's: Dutch Clocks
i.e. German clocks, chiefly made in the Black Forest. As many as 180,000 are exported annually from Friburg. (German, Deutsch, German.)
A woman, that is like a German clock. Still a-repairing, ever out of frame, And never going aright.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894