Actually I was wrong about the crown key. I think it is the platinum and diamonds fleur de lis key. It comes in 1" and 1.5"...pretty sure this is the latter? Unfortunately very expensive!
I think it's the fleur de lis key. If you google it you will see people say it's one or the other (fleur or crown) but to me it doesn't look long enough to be the crown key. It is gorgeous....I love it. I think you could accomplish a similar look with a SS key if that's really what you want.