Device with axial lock and retention device and methods therefor

A device, comprising:

• a case comprising a case sidewall defining a circular receiver having a receiving opening and a central axis, the case sidewall defining at least one aperture having an aperture axis oriented substantially orthogonally with the central axis;
• a waterproof device body comprising a sidewall defining a receiving aperture, the waterproof device body to insert into the circular receiver along the central axis;
• a crown stem comprising a push button disposed within a duct of a threaded bushing and one or more O-rings disposed about the push button to allow translation of the push button in the duct while preventing liquids from passing through the duct, the push button defining at least one recess;
• and
• a retention clip attached to a shaft of the push button to retain the push button within the duct;
• the crown stem to insert through the at least one aperture and the threaded bushing to hermetically seal the receiving aperture when the waterproof device body is inserted into the circular receiver to prevent the liquids from entering the receiving aperture.