Correction or ...
I couldn't read it ( I can hardly even see it !!) so I used a certain degree of logic and went to detail on the web on al Hasa Oasis and the master smiths I could find.
The closest I could get indicated words used to describe another Jambia weapon Quote"The script to the rear reads "Amal Ahmed bin Mursi" work of Ahmed bin Mursi''.Unquote. Could it be that your translation is cockeyed insofar as the last few letters ...? Not that it makes much difference since it is not the name that is inspiring definition but the question as to where and what was the link between Oman, Asir and Al Ahsa /al Hasa ...?
My suggestion is that they were all linked through slavery and trade. To the south the ports of Sur in the Wusta region was linked to Zanzibar via Jazan in the Asir and by sea also to Bahrain and all stations north thus capable of feeding goods to Al Hasa Oasis and of course by trade and slave camel caravan to Al Hasa via Buraimi Oasis.
My hypothesis suggests that the Muscat Khanjar could have feed into al Hasa whilst the al Wusta may have filtered down to the Asir from Sur or a combination of all of that. Artisans were flooding south with the migration to Zanzibar thus any of these arrangements could have transpired. What is not clear is how the two Saudia regions interacted since in the time frame and before 1923 the Asir was not in Saudia moreover even after that and for decades Asir was cloaked in secrecy ... but that can also be said of Al Hasa... reflecting the difficulty we now face today unraveling the puzzle.
Either way for now at least it matters little who signed the work but the more interesting story lies outside the box and demands a certain lateral thinking but I think we are almost in range of the answer.
Further note ... I went to a reputable specialist site and pulled the detail off there for research purposes;
http://www.swordsantiqueweapons.com/s1316_full.html for which I Quote "A very high quality Arab Jambiya dagger from Saudi Arabia.
This Jambiya measures 31cms tall in its sheath.
The body and sheath covered wholly to the front in exquisite filigree and applied silver decoration, the hilt of darkened timber that closely resembles Rhino horn which is applied with silver.
To the lower part of the sheath at the tip on the back there is an embossed panel of Arabic calligraphy, the front with floral motifs. The script to the rear reads "Amal Ahmed bin Mursi" work of Ahmed bin Mursi.
The blade is of good steel, deeply curved and with a thick strengthening ridge along the middle. Old glued repair to wood crack on the hilt is hardly noticed".Unquote.
That weapon is shown below... and is almost a carbon copy of The Al Wusta Khanjar of Oman.
Regards,
Ibrahiim al Balooshi.