Would love to have some light shed on this question, and to see if anyone else has encountered the same thing with their 670. I've recently come across a vintage 3rd gen. lounge chair and ottoman (based on the date label, I believe 1975) and it's in gorgeous condition. Beautiful, re-oiled gorgeous rosewood veneer, reupholstered seat base, new front shock mounts installed (rear ones are still original and in great shape). The chair belonged to a former employee of Herman Miller who was gifted it upon retirement. There is one flaw that is weighing my decision to buy it: a small crack in the first layer of inner veneer on the back panel, where the ear connects to the back. It was epoxied and sanded sometime ago I believe, and looks to be sound and good. Would hate if it cause me some serious failure in the near future though. Has anyone encountered this before, and if so how was it dealt with? Should I move forward with the purchase given the rest of it is impeccable? Thanks very much!!