S-50-V
THE vintage strat pickups, great high-mids to get 50's style tones.
moderate output level.
S-50-C
Same as the S-50-V but overwound, bringing more low-mids and a bit of natural compression.
Good output level.
S-60-V
The typical 60's style strat pickup with great warmth and dynamics. A best-seller ! 
Good output level.
S-60-C
Overwound S-60-V, more power, and slightly more compressed tone.
Good output level.