What a true labour of Love and Passion. Something that will still be wowed over in 50 years plus. You should definitely put the start and finish date on the label on the back. Will show to future generations who maybe are not quilters, to realise just how much time and work went into it.
I can understand why it would never leave. You couldn't put that much work and love into any item and not want it to be passed down to your children. I know I would only be able to put that much of my life and be able to stitch true beauty into something for my own children.