This is a Automatic Parking Meter disc with Clock.

In Germany: A blue PARKING DISC is a rotating disc marked with 12 hours.

When you park in a designated parking disc area, you must leave the disc on the dashboard of your vehicle, set to the time that you arrived. This allows authorities to know how long you have been parked. You will be fined if you park in an area marked with the blue sign above without a parking disc.

Size:15*11cm
Each in a white paperbox

CTN size:57.5*33*34cm;  100pcs/CTN
NW/GW:11.5/12.5kgs
Material: Plastic