It's not meant to be a relic, or a serious bass for that matter. it's a novelty instrument they knocked up, if you follow their FB then you'll see they do it every now and then along with more regular one-off examples of their range. It's marketing basically, they do it for fun and to get clicks/reactions. The only place it's been described as a relic is here so they aren't trying to pass it off as anything other than a bit of fun. They describe it as "The Fossil" btw, here:
https://shop.warwick.de/en/Instruments/Electric+Basses/Warwick+Showroom/Warwick+Custom+Shop+Corvette+__,+4-String+-+Sanblasted+_The+Fossil_+Transparent+Satin+-+18-3794+-+Showroom+Model