Classifying shashka--a serious discussion of typology

[ALEX]

Here is an unusual Central Asian/Bukharan shashka. Although the blade is of a shamshir form with slightly raised Kilij-style yelman with double edged tip, the handle with 5 rivets and crossguardless design are typical Bukharan shashka features. I do not recall seeing relatively deeply curved blades with rudimentary yelman on known Bukharan swords of 19thC. Can this be an early example, like earlier than mid-late 19thC?