Hi my friend
it's more a small cretan knife
yes
the silver chased scabbard is really well made,
yes, for the medium part and no, the top and the tip are not good.
the coins are old, pre 1900,
They look like coins but I think they are commemorative dates
Bone and 4 pins for the grip, I think it's mid 20th c. maybe later
We have many Greek members on this forum, they will tell you more.