Re: Unknown Edison Screw Lamp Holder
I think I've opened similar in the past - I think it 'splits' at the join nearest the cable entry, with the whole of the front part unscrewing from the section where the cable enters.
It'll probably unscrew a fraction then stop - if so, look inside, and you'll see where a small metal tab, or two, fouls a raised section of the front moulding - just bend it / them inwards, sufficiently to clear the moulding, and it'll unscrew the rest of the way. You can bend the metal tabs back once it's open, they won't stop it closing again, and will just 'lock' it in position as before.
Alan
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