OJTT shows a black dial Ranchero 2996-1. Dial characteristics and all three hands seems to match up well with the OP.
View attachment 626422
Edit: As my Broad Arrow Black Dial 2996-1 Ranchero is also Caliber 284, Movement 1684xxxx and has only Swiss under the 6, I would presume the OP is indeed genuine.
View attachment 626424
Nice find!
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