Hello I need help to identify this coins and which country is from

Ethiopia.

Several coins are elligible, we need the diameter.

And also a photo of the other side.

This lion appear in all of their current circulating coins, the only one that can be outright ruled out is the 1 Birr because it is bimetallic.

Diameter 25mm. Weight 9.5 gm

your weight is probably 3 gram off as 50 santeem weight only around 6 gram.

You would also need to check if it sticks to magnet as same year has magnetic and non magnetic variant.

You could also just search Ethiopia in catalogue and find it yourself.

N#63353 or N#4759 year 1969 (1977) Did you mean 5.9 gm?