Pedometer in a roughly square white and grey plastic case

Pedometer in a roughly square white and grey plastic case, decorated in white and bearing the name SPORTLINE. Rectangular plastic-covered digital dial, marked in miles. Mechanical movement. Stride adjustment to one side and zeroing lever to the front. Cast into the belt clip the words MADE IN TAIWAN. Late 20th or early 21st century. 62mm x 52.5mm. Maker unknown.