What was the last year the Oliver name was ysed on machinery, mostly interested in grain drills. What year was the steel box drill built? Model number? When were the wood box drills built. Still a big demand for the wood box steel wheel models in the 12-8 or 13-7 sizes with smaller ones wanted as well. One comming up at auction probably end of March and auctioner forgot to pay attention if wood or steel box or how many openers, knows it is smaller unit on low rubber. Thought it was older, possibly 20 years. I think it has been longer than that since the Oliver name was used. I buy for the Amish.