Ancient / Antique Solid Silver :Extremely RARE novelty Aztec / Asia Spoon Mould?

An extremely rare antique novelty solid silver Spoon Mould? possibly South American Aztec theme or Asian. We got this in a house clearance more than 30 years ago hoping to see something similar but we never have so it has sat in a drawer until now and this is the first time we have had it on the market. The inside of the bowl could ? be a mould we thought but are unsure. Clearly the item is antique possibly ancient (we are happy to help and answer all questions within 24 hours usually), we cannot see any markings on the item and it weighs just under 3oz. The item is very well made with a cast finial and the bowl is of good thick grade. If anyone can direct us to a source for this we would much appreciate it and would add the information to the listing. The item looks fantastic cleaned (should have done it before photographing sorry about that but we are extremely busy at present doing shows).

Good Antique Condition - small split as seen on back of wing - please see images

8.5inches (22cm) length approx

Antique Silver
Antique Sterling Silver