Reading device for an apparatus with glass or screen

A system comprising a watch glass or screen for an apparatus used for displaying an information visible to a user, wherein the watch glass or the screen comprises:

• a second layer, in the form of a transparent protective film, comprising a second outer surface and a second inner surface opposite the second outer surface, wherein the second outer surface defines a convex shape;
• a first layer, formed of transparent polycarbonate, comprising a first inner surface and a first outer surface opposite the first inner surface;
• and
• a positioning structure defining a second rim structure, wherein:
• the positioning structure defines a convex outer surface and a concave inner groove:
• the second layer defines a convex peripheral edge;
• the shape of the concave inner groove corresponds to the shape of the convex peripheral edge;
• the convex peripheral edge is received by the concave inner groove;
• the convex outer surface of the positioning structure aligns with the convex shape of the second outer surface of the second layer;
• and
• the positioning structure protrudes from the first outer surface of the first layer wherein,
• the second layer is removably affixed to the first layer, with the second inner surface interfacing with the first outer surface;
• the first layer is rigidly affixed to a sealing projection, wherein the sealing projection defines a first rim structure extending towards the first layer, with the rim structure interfacing with an outer periphery of the first inner surface, to define a gap between the rest of the first inner surface and an information screen of the apparatus;
• and
• the second layer is operably replaceable, while the first layer is still affixed to the sealing projection.