This is not a 3d file.
Use your inkjet printer for this one.
I printed this on printable vinyl sticker paper matte premium.
You could use other type of paper like photo paper or cardstock.
I used Mainstays Basic Indoor 8.78 Red Analog Round Modern Wall Clock that you can get at Walmart for $5.92
The clock is easy to take apart.
Just print, cut and glue. Resize if using a different size clock.
Reinstall the hands at 12 o'clock and try not to get fingerprints on the glass.
Backing plate stl file if needed.
Have fun and be safe.