Eyelash mark

eyelash markings found on swords

eyelash markings found on swords

The "eyelash" or "sickle" marks of Genoa and elsewhere are well known and often imitated, that is, added to blades originating in German or the Caucausus. 

A different type and pattern of eyelash marks appears frequently on swords in S.E. Asia.

Example of Eyelash marking on Thai Dha sword

Example of Eyelash marking on Thai Dha sword

Eyelash marks on Thai Village dha

Eyelash marks on Thai Village dha

See also the excellent discussion and examples on this thread in the Ethnographic Arms & Armour Forum.