Sony SWR50 Stock Firmware (flash file) download from below direct link.
Download contains Firmware, Flash Tool, Driver and Instructions.
Model: Sony SmartWatch 3 SWR50.
Flash Tool: Sony Mobile Flasher.
Download
Sony SmartWatch 3 – Download
How to flash
Click here to view complete flashing instructions.
Firmware Information
[*] Software Version: SWR50_M1D64T_1291-6001_Global Android Version: Android Wear OS