Vintage Pickups ID

[nfenster]

Hi everyone,
I’m looking for some help definitively identifying and dating this set of vintage Seymour Duncan pickups.

The Details:

• Model: These are the single wide-blade design, which I believe identifies them as STK-S2 Hot Stacks.
• Construction: These have the "Clear/White Bobbin" look—the amber resin and copper windings are visible through the bottom (see photos).
• Covers: Original black covers with the raised "S" logo.
• Wiring: 4-conductor leads with the black outer jacket.

The Labels:

• Bridge: 2B-S
• Middle: 2N-S
• Neck: J2N

My Questions:

1. Since the "J" is a prefix on the J2N (rather than a suffix), and considering the clear/white bobbins, does this point to the Janice Salazar era (pre-'83), the early MJ era, or a specific mid-80s production run?
2. Does the "S" suffix on the 2B and 2N labels simply confirm the "Stack" model, or does it have another meaning in this era?
3. Is it common to see the "J" at the start of the code like this on early 80s Stacks?

Any insight from the Duncan experts on the exact year or rarity of this set would be great. Thanks!

 

[idsnowdog]

They look like hot stacks.

 

[nfenster]

Yes, I am pretty sure they are Hot Stacks but I am curious from when, and what the markings mean.

 

[jeremy]

hot stacks, one bridge model, two neck models. im not sure about the year