Identify a pickup

[nigelkirkby]

Hi All,
Can anyone identify an old SD pickup that I aquired in a strat some time ago. It was in the bridge position and has a lable B1=S on the back, it has four wires red, black, green and white also a ground coming out of its two stacked coils, it has staggered magnets. It was covered by a dark red SD pickup cover and I have not been able to find anything like it on the site.
Hoping somone can help.

 

[Bones]

Re: Identify a pickup

Sounds like a Classic Stack.

 

[nigelkirkby]

Re: Identify a pickup

Thank you, I think you may be right, it is the nearest I can see to it however it must be fairly old. It sounded thin and reedy but I think whoever wired it had stuck it in out of phase and bypassed the tone circuit. Time to experiment I guess, now all I have to do is find a good neck and middle to go with it!