This is indeed a classic example of the Moroccan sa'if commonly referred to as a 'nimcha'. The hilt form with its distinct quillon system is characteristic of these swords and has existed in regions of the Maghreb littoral since the 17th century. The hilt form itself apparantly evolved from early Italian influence carried via the well established trade routes into North Africa, and is thought to have influenced other hilts such as the Sinhalese kastane in the more eastern extensions of those trade routes. This was discussed by Anthony North of the Victoria & Albert I believe in about 1975.
The stamped semi circles and three dot arrangements do indeed reflect the early markings associated with Genoan and possibly other N.Italian blade makers. Through trade these distinct markings diffused to other blade centers including, as Ariel mentions, the Caucasian locations. In my opinion this blade form seems consistant with trade blades, possibly German or European which seem to occur on swords in Arabia and India c.end of 18th century to early 19th, with the so called 'eyelash' or 'sickle' marks often on them. The German blades on Scottish basket hilts of the 17th century have these markings, and the markings are of course well known in India, on the Afghan paluouar the marking is almost a constant, in the Caucusus these marks bring the quality term 'gurda' to so marked blades.
I agree with Kirill on his assessment of the acid etched inscriptions which were probably applied later in the 19th century. While the process was certainly known prior to this, it was then that it became more prevalent, especially in Ottoman regions among others. The Arabic script in motif on the face of the blade bears some resemblance to the thuluth applied in this manner in regions of the Sudan, though I am not implying this is thuluth, but one of the scripts used in this manner.
This is a beautiful example Tatyana!!
Although the scabbard is absent, it does seem these are often found that way as the leather scabbards often do not survive. As with most weapons of North Africa, refurbishing was a constant process, and the integrity of the weapon itself is typically carried in the blade, which as we can see, reflects its history through its working life. Fascinating !!!
All best regards,
Jim