Patent ID: 8292493

Claim:
A method for manufacturing an interchangeable movement comprising: assembling parts into a movement subassembly, such that the subassembly is a complete working mechanism, enclosing the subassembly in a body, and integrating a glass with the body, wherein the body comprises a single shell with only an opening that receives the glass, sealing the glass and the single shell to enclose the body, thereby creating a water resistant modular movement; inserting the modular movement into a case of a portable device having a receptacle formed in an opening in a rear of the case for removably receiving the modular movement without tools and in a manner where the glass of the modular movement is visible through the case when the modular movement is inserted; and calibrating a latching mechanism of the case to account for when the case is worn and the modular movement is inserted into the receptacle, the modular movement is held inside the receptacle at least in part by a wearer's body.