Apple WatchOs Firmware For MFC Software Only (iBUS is Required) , The relevant operation at your own risk.

WATCH SERIES 0 (1ST GENERATION) 2.1

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Watch1,1_2.1_13s661_restore_n27aap_38mm.ipsw
iBUS S1 Tool
iBus Tool
MFC & iTunes
Working Software
2017-01-01
Add Date
The file can help you a lot ?