Hi Dom,
Ok, 'ole faithful' will have a go
The blade decoration reminds me of the large dagger that Fernando had in the swap forum a while back (he has sold it, so it's not still 'for sale' and so it's ok to talk about)
The decorations on the scabbard and hilt look like applied disks. They also seem at odds with the Ottoman origin and in fact remind me of Japanese Mon/Kamon in style.
An interesting piece, be nice to see it restored.
Best
Gene