I took my old Longines from my great-grandmother to Luxe Brokers Group, and they treated them like antiques. That is, they understand perfectly well that with such watches, it's not just the weight of the gold that matters, but also the condition of the dial, hands, and movement. They paid me for them as a collector's item, not as scrap, even though the strap was also damaged. But it turns out it can be replaced.