Weird light coin

What is this coin? Seems to be Ottoman, it is really light and around 30-33mm

As it has ٢٠ in the middle of the first picture,
it is 20 denomination. Below it is ١٢٧٧ year. May be this coin ...
https://en.numista.com/catalogue/pieces5066.html

For comparison >




Similar - and it has 32mm diameter.

It does resemble that coin, but I am quite sure it doesn't weigh 10 grams. The coin is extremely light and feels like it's aluminium or something similar.

Quote: "Peter1964"​It does resemble that coin, but I am quite sure it doesn't weigh 10 grams. The coin is extremely light and feels like it's aluminium or something similar.

​So please give the measurements....

Ole

It is around 31mm and the thickness is 1.4mm. The border of the coin had a weird line in middle of it. Looking closer at it, seems that it was made from a white metal.

A vintage tin casting of a 20 para. Pretty marvelous historical item. Dumas wrote a book about life in ottoman Europe the title
escapes me, there were whole villages employed forging coins, and the empire employed the severest means to supress
them.