I found this while cleaning out my parents guest house in the back yard. This was in the storage closet. Was a little dusty, but after a quick rinse looks like new almost sorta kinda....lol...but this thing is classic..What I didnt know was chevron either owns, owned, or was partner with Ortho.....I forgot all about we had this from years ago. I remember I pushed this thing around the yard about 13 years ago seeding my parents lawn. It still works, and the calibration seems to be on point.