As Ariel has noted, the 'industry' of creating representations of traditional weapons is well known in Afghanistan, particularly in Khyber and Northwest province regions, and has been since mid 19th c.
I had not noticed the 'drag' on the chape, a distinctly western affectation reflecting the move to western influences post 2nd Afghan War (1879-80).
By this time Afghanistan had become controlled by Great Britain much as in the Indian Raj, and the military was augmented by native units as well as the use of British uniform elements and weaponry.
The Khyber knife was vestigially replaced by European style hilted short sabers, though these hilts were also placed on the heirloom blades of the Khyber knives in many cases.
The inscription on this blade is likely in either Dari Persian or in Naskh if in Pashto. Unfortunately I cannot translate.
The 'mecca stones' are an unusual affectation in these (I think Ashoka had one) and these are known in pommels of late 19th c Sudanese swords, so possibly a Sufi feature?
On a personal note, my preference is to avoid overcleaning swords, primarily because I am a historian, and removing patination is to essentially remove history itself in a sense. Naturally it is important to stabilize a weapon from any active corrosion or rust, and add any minor repair to maintain the integrity of the weapon. However over cleaning and alteration typically remove the elements of the 'adventures' the weapon has gone through over time and its working life. Just my thoughts
each collector has own preferences.