Ok. I have wanted an injector to start making gear. I finally made attempts at finding a decent injector. I came across a woman who was selling her grandmotherís injector. It is a Riccar Duchess 220 model RZ-204B. Can anyone tell me any info on this unit? The dates they made this model? It runs well. I had it checked out by a knowledgeable person and the feedback on operation was positive. I call her "G.I. Jane". She weighs like 60lbs! Paid $20!