mmm..................all 17th century pommels are possible but a (flattened in the plan of the blade) globular or reversed egg-shaped pommel engraved as the guard would look nice.
pommel types such as in
http://www.vikingsword.com/vb/showthread.php?t=17320
mefecit salingen= Solingen made me.
I cannot enter my books but in wapenhandelinghe by jacop de gheyn is a sword of your type if I remember well.