My brother has 100% original 1958 Strat in outstanding condition. Wear level looks a lot like that bass. Neck looks the same. The finish on the body looks faded to me. I think the discoloration under the bridge cover is from humidity, sweat and general crud accumulating in there over the years. I’ve seen similar discoloration on other vintage instruments. I don’t think it’s a refin. I’m not an expert, but that looks like a legitimate vintage instrument to me... his prices seem really high, though