Classic later 60's vibe, wound with plain enamel (PVA) coated vintage spec wire a little higher in output than the PRE-BS 62 at 6.2k and with a smoother top end. 
Balanced with an overwind on the bridge. 
 
Masterwound single coil Strat pickups are sold as complete sets of three. 
 
Oil City ‘Masterwound’ range
Our premium series: these pickups take on the top boutique makers worldwide, and set a new standard for tone.
‘Using the finest materials and with the most exacting assembly each Masterwound pickup is hand made, serial numbered and signed, by me alone’.
~ Ash
As fitted to Feline Guitars,  the Blackmachine B6 and many quality UK made custom instruments.