Decades: 1630s BC 1620s BC 1610s BC 1600s BC 1590s BC - 1580s BC - 1570s BC 1560s BC 1550s BC 1540s BC 1530s BC
Significant People
... of the gyroscope in the Dynabee is fixed to the spinning mass and it rests in a little groove inside the wrist exerciser device, which almost completely covers the ...