I am using an OMAS 630 demonstartor pen from about twenty years ago. This is a small pen that was fitted with a steel nib and was affordably priced. The nib in my pen was not as smooth as I wanted. I fitted a Schmidt nib and used it for a few years, then I came upon a CGB pen from Italy (a very inexpensive pen) with a very smooth Indian nib. The pen was covered in a gummy substance and had becom sticky and unpleasant to the touch. I swapped nibs and now my little Omas writes very smoothly!

Picture by FPH