I have seen quite a few of the silver sticker type. They appear on the 1971 Clubman and Clubman GT. I assumed they were an interim switch panel used before the Black logo was used or if there was a supply issue. A few of the GT road test photos show the Silver Logo. The pics are too grainy to see if they have the HOT wording.
Attachment:
YG2S8 501 dash.jpg
Attachment:
YG2S8 503 Dash.jpg
This GT is either missing the sticker or it has a silver sticker hidden due to the shine.
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CHI335 Dash,.jpg
Here is a pic of a switch panel with Silver Logo with the HOT wording. I am not sure why yours would be missing the HOT.
Attachment:
1971 Clubman or GT switch panel.jpg