1953 Gilded Coronation Crown - Genuine?

Genuine. Post Mint gold plated (as indicated).
I like it! Unfortunately no numismatic value, but it does have some small collector value for those that like that sort of thing.

Just gonna add a note here - as a coin dealer mainly working in the UK market, these things sell shockingly well. Not huge money, but if I put this in my shop window in central London (not now, of course, as lockdown), this would be gone within 48 hours, and I'd expect to get £30-35 for it (retail, of course as with the nice box, etc). On the other hand, I have a proof 1893 crown in gorgeous shape in the window for 30-35% below auction asserted market value, and its been there over 6 months. Many coin collectors will turn their noses up at this type of thing, but I think it just goes to show that you can't ever ignore the wants of the masses.

Thanks all, great info. Big thanks to @norantyki for that in depth analysis. I suppose I could list on ebay.co.uk and see how well it goes. Cheers.