Rolex watches include a serial number stamped between the watch lugs at the 6 oclock position. You will need to remove the bracelet in order to find this. An authentic watch will have a deeply engraved serial number. You should be able to hold it to the light and see a slight glow around the edges.

Should I take the plastic off my watch face?

No. Do not want. Complete nonsense only bacteria and other stuff will accumulate under the sticker remove it as it serves no function to the watch.

How can I protect my watch face?

Get a plastic screen protector to keep scratches from damaging the crystal. Go online and purchase a plastic screen protector for your brand and watch model. When the protector arrives, peel off the back of the plastic and carefully apply it to the face of the screen.

Does Apple watch come with plastic on back?

Apple Watch cases are made of various materials that include the following: Aluminum Apple Watch case—7000 series aluminum, Ion-X glass (strengthened glass), composite back (plastic)