I just bought an approximately 60-year old- "true grand rapids" sofa made for Paul Schatz and wanted to tell you that after removing the upholstery, I was stunned that all of the springs are still in perfect condition, and I mean in the back, the seat and the cushions. At every opportunity, the maker of this couch used the most expensive, time-consuming methods and materials. It was stamped and numbered.  I especially liked the individual muslin coil-covers in the seat cushions. This couch was unbelievably made, and the tailoring was exquisite. I will likely fail to reproduce that quality on the reupholstery, but wanted to tell someone there that it is true that quality furniture stands the test of time.D. Mc