Mr T,
Tulwars and pulwars are usually still pretty sharp, and were very sharp when carried and used.
It is not unusual to find the suspension rings on the inside of the curve, so that even though the sword is cased in wood, it rides on the spine to protect the edge.
In the book Sahib, the author mentions the Sikhs delivering sword blows with a "Hissing sound" In other words, giving the blow all they had.
Another first hand account in the same book states that in a cavalry charge againt British cavalry, the Sikhs would lay on their horses neck as they passed through the British line, being protected by the thick pugaree on their heads, and a buffalo hide shield on their backs.
As they passed through the British rank, they rose up in the saddle, and turning, delivered a hard back-hand blow to their opponents.
The first hand account mentions an office next to the writer, who with such a blow was cut clean in two from shoulder to hip by such a blow.
The sword cut also severing his cartridge box of ammunition that was on his back.