Salaams ; Note to forum. The question as to where the Metalic Long Hilted Red Sea Variant see fits is interesting in that it could be the source of the Omani Long Hilt on both Curved Kattara and The Straight Omani Dancing Sayf.
It is now suggested that the sword is related to an Abassiid form at the Istanbul Military and Yemeni Military museums thus see the entire thread at;
http://www.vikingsword.com/vb/showthread.php?t=16205
See my comparison with a sister weapon at # on this thread which needs to be added the very similar attributes on both swords in hilt design
1. Pointed pommel.
2. Pommel not part of the tang but separate though part of the hilt top configuration.
3. Rounded hilt probably octagonal following period mosque styles.
4. Cuffs in both styles.
5. Rivvet supported design in essentially two parts.
6. Quillons in one form and folded quillons supporting the cuff in the other and the slightly different design probably governed by the different length of blades.
In all respects the Red Sea Variant appears as a stretched Old Omani Battle Sword Hilt. In a separate assessment the Red Sea Variant could be the key link as the mother of the Omani Long Hilt on both Straight Sayf and Curved Kattara forms. 
The question as to a link to the sword in the Wallace is open to speculation and obviously in itself a huge undertaking.
Regards,
Ibrahiim al Balooshi.