As per Jens Nordlunde (
http://www.vikingsword.com/vb/showth...hlight=sailaba) #5 is a
Hyderabadi sword called Sailaba. It is listed in a catalogue of the Hyderabad museum, dated 1780 and the legend says that they have 27 sailabas dated to 17-19 century.
I have one for sure, another of similar profile, extremely large and heavy, and yet another with tulwar handle and Ottoman yataghan blade dated ( presumably) 1101 H, i.e. 1689 Gregorian.