Anyway. From what I can see in the pictures I would be fairly sure that the key is a fantasy / fake. Not a real working key at all. I’ll give a few reasons here.
1 - Very few keys are made from solid brass as they tend to wear badly, if this were a real key I would expect it to show signs of use and wear. There are none. Brass is however perfectly suited for making fantasy items etc as it’s easy to work with & cast.
2 - The type of the key, ie single sided pipe is normally used on chests and box locks, not doors or gates etc.
3 - The shape and design of the bit is entirely wrong for what it is trying to look like, if anyone is interested I will post some further information on real european vintage keys.
Hope you did’nt pay a lot for it, if the seller was passing it as real I’d seek a refund.
