Nokishita narrowed down the registration of the WW111327 and it looks like it was for the Sony A1. This registration was first found last year here.
As for Sony cameras registered in the certification body, WW111327 seems to be compatible only with ILCE-1 2.4GHz, WW728473 is compatible with ILME-FX3 5GHz, and WW558244 is compatible only with ILME-FX3 2.4GHz
Sony A1: B&H Photo / Amazon / Moment / Adorama
Sony FX3: B&H Photo / Amazon / Adorama
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via Nokishita