please see
http://www.vikingsword.com/vb/showth...light=baselard
I actually only know them non tapering, which of course does not mean that it does not exist.
what I did find @baselards is that there are flat grip scales and grip scales in the shape of a rondel dagger grip.
also characteristic is the double fuller strongly tapering to a point @ 1/3 of the blade
hope it helps.
Jasper