Gorgeous vintage channel set princess cut diamond and 14K gold bangle

This is a gorgeous vintage channel set princess cut diamond and 14K gold bangle. I do not know the exact year it was made but I believe it was made in the 1980s by Derco Diamonds of San Francisco. It has a 14K stamp and a Derco stamp on the inside of the bangle. There are 28 princess cut natural mined diamonds of about 3mm x 3mm or approximately 0.15 carats each, and the total diamond weight is between approximately 3.5 and 4 carats. The diamonds are GHI color and are of clarity ranging from VS to VVS1/VVS2. The total weight of the bracelet is between 16 and 17 grams. The bracelet width is approximately 4mm. The bracelet has a figure 8 safety catch. There are minor scratches on the bottom of the bangle that can be buffed out, but it is otherwise in good condition. I have two appraisals from different jewelers, both of which are now outdated. One is a replacement value appraisal dated 1990 in an amount of $12,400 ($31,223 in 2025 inflation-adjusted dollars). The other is a 2016 sale price estimate of $8,325 ($11,272 in 2025 inflation-adjusted dollars). I am happy to include the appraisals with the bracelet if desired. The bracelet comes in its original box.