Well I have two of these and both have failed with the 789, bio, jul, m,. keys. Strange eh? BTW, if you just lever the white plastic panel carefully with a longish blade, you can get it off non-destructively.
My ones have the grey cover in the centre rather than at the end.
I will stick them in the shed and if anyone wants them for spares (just pay the post) , try and get in touch
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