Hi All, I'm a guitarist and songwriter in the market for a low cost bass to use in home recording demos. I've come across a Fender Jazz bass that seems very well priced. Seller claims it is his father's old bass. Thing is that it sports pickups I've never seen on any other Jazz. Seller claims not to know if they are original. They have aluminum covers like the neck pickup on a telecaster. Are these original to an idiosyncratic model? Or upgrades of some sort? Are there other basses that use similar pickups? Any input would be helpful and most appreciated.