This model is remix of my previous Parking disc/clock. Model is downsized to pretty pocket dimensions 96 x 96 mm to spare some material. This time I did two cutouts on sides instead one at the top.

 This gadget is often used in EU countries to indicate how long is your car parked in restricted or toll parking area. Using this disc you can leave your car on toll parking lot for short time period without any fee. (in discussion I was told that it can't be used in Germany but here in Czech Republic you can paint it also with crayons so 3D print is more than OK) 

I printed those part with 0.4 nozzle, 0.15 layer using multiple colors with M600 command. Printed parts should be easily snapped together via pins and secured with glue. Because of high temperatures in car during summer time I highly recommend print those parts with heat resistant material otherwise you risk that it will start live with your dashboard in one happy plastic symbiosis. Printing time is around 3 hours