I have an International firearms rossi 22lr 7 shot double action revolver no model or serial numbers Can anyone shed some light on this I need grips for it and dont have a clue?

This may or may not be where the serial/model number is on that certain firearm but, open up the chamber and look on the small flat piece of metal just in front of the opening towards the barrel end. There 'should' be some numbers on that plate. This will be the serial and the model number of the firearm.