Whilst considering the outer shape of the star on the sword only, not the inter crossing lines forming the seal of Solomon, a quick Google search found this link below.
From Al Liwa, Sultanate of Oman.
http://star-of-david.blogspot.com.au...n-joradan.html
A quick flick through The Craft Heritage of Oman by Richardson and Dorr notes that the 6 sectioned floral motif is featured in Oman decoration and jewellery and other craft aspects....But again without the inter crossing lines that make the seal.
Scroll down 2/3rs of the page here for a glimpse of Oman silver work in the star pattern and the Jewish reference;
https://shereenshafi.wordpress.com/2...im-project-4b/
When considering the long established sea trade and similar cultural aspects it does not seem out of place on this sword at all.
Gavin