Genuine AP,One of the two return springs, per wheel, for Mini single-leading front drum brakes 1959-64 and all lower Mini rears. This is the spring with the coils near each end.
A good mechanic will replace the pull-off springs (
17H7621 and
17H8092 when installing new shoes. The return springs rust and fatigue over time and may have been damaged by improper installation in the past.