For me it looks old.
Because it looks old I simply would ask the question what it is and how old it seems to be to the biggest museum that has a fitting collection.
London, Paris, Berlin for example.
Your chance to get a fast and free answer is pretty high.
The value could tell you Sotheby's. The current sell price you know after an international auction. Such stuff goes up and down.
If there is a Japanese multi millionaire who wants it, the price is different to what I would pay you because I need a sharp kitchen knife.
No, better, you need several Japanese and American multimillionaires...
Some stuff develops incredible prices, other stuff doesn't.
Byzantinic coins for example they throw behind you, if they aren't gold or silver.