Afternoon all, I recently picked up a cheap, used MiJ '57 Precision. It's an 'E' series from somewhere between '84-'87. Apologies for the dreadful pic - my fone camera sucks!  It has a maple neck, alder body, an aftermarket anodized pickguard (from doing a bit of digging online it seems these basses came with a 1-ply white guard) which I'll be replacing, and the previous owner has added an active SD APB-1 pickup, so I'll be replacing that too and reverting it back to a passive pi