There is a local church that had asked for a system repair quote many, many moons ago. The system probably dated to the mid-70's. The person that asked me to give an estimate was over ruled before I could even get over to do it. They had decided that they would get someone in the church to do it. That was probably 8-10 years ago. Well, someone finally got around to doing it here in the last month. I knew that they had old Safe-T-Lawn heads in there, and I really wanted to grab a few for souvenirs. Darn if they didn't leave them right out near the dumpster But did Nelson put a similar head to the Safe-T-Lawn rotor? I ask because from what I remember, the sprinkler system at my parents house had what I thought were Nelsons that looked just like these. It has been years since I have seen them. My Dad had the system installed around 1975 and I don't think it got used much after 1980. Most ended up buried never to be seen again. There was one that sat near the A/C compressor that remained visible...and I thought it was a Nelson. I have never encountered these heads but in two or three places. Two of them had Safe-T-Lawns, but I could have sworn ours were Nelsons.