Atlas neon 'beehive' lamp

Yesterday (01/04/24) I went to a local antiques fair boasting around 200 - 300 stalls. As I was strolling around, I spotted this lamp in a fitting. Me being me, I asked the seller how much he'd want for just the lamp and not the fitting. Exclaiming how odd a request that was, he sold it me for just £3, steal!

Getting it home and cleaned up, I noticed the atlas branding on the lamp cap, along with a code 'X964200' or something like that, its not really very clear to read accurately. Of course its works, and judging by the fact no blackening is present, plus no damage to the lead connecting pads on the lamp cap, leads me to assume its brand new old stock and was just thrown in the fitting for effect.