For Samsung Galaxy Watch3 41mm (R850) - Replacement Rear Housing Shell Assembly - Mystic Black

Restore the structural integrity and biometric accuracy of your wearable with this Replacement Rear Housing. Specifically engineered for the SM-R850 stainless steel architecture, this Mystic Black shell is manufactured to original mechanical tolerances to ensure a precision fit with the internal electronics. It is the definitive hardware solution for resolving cracked rear glass, compromised heart-rate sensor windows, or moisture ingress due to case damage. This assembly maintains the necessary alignment for consistent PPG sensor contact, ensuring your health tracking and wireless charging remain reliable throughout the device's extended lifespan.