Originally Posted by A.alnakkas
Your dagger is 100% Saudi. Made in AlAhsa region, likely by alDajani family. Others made these daggers but this is their trademark craftsmanship. The blade is locally made, generally fitted on daggers made in the 60's and 70's. I do not find them on any others made later. I tested their quality, generally lesser.
Edit: on the chape you can find the maker's name. Put a close up and I can translate it to you.
The general confusion about this style of dagger and its attribution to Oman is generally based on bad attribution from a book or two. One from the top of my head is a book specialized in Omani silver. Omanis in this day make this dagger strictly for the Saudi market but their craftsmanship is not highly sought and finding examples is rare.