I'll bet that's an original version (silkscreened logo, not the "badge" logo) SP B3, not a B1.
I have a B3 and a B1 sitting front of me, and the original (silscreened logo) B1 doesn't have switches.
Also, the B3 switches are THREE POSITION switches... do your switches have three distinct positiions? If so, it's a B3.
The switch on the front is the pattern switch; up is omni, center is cardioid, down is figure 8.
Another telltale difference is on the back of the mic... see the "CE" logo? on a B3, it's positioned above the rolloff/flat/-10db pad switch (top, middle and bottom positions); on the B1, it's positioned near the bottom of the back side of the (switchless) mic.
Hold the mic up to a light and look at the diaphragm(s)... if you see a gold disk on both sides with a wire running from the center of both sides, it's a B3.
If it appears to be gold on one side with a wire in the center, and the other side looks silverish with no wire, it's a B1.
I think you got a killer deal on a first generation SP B3, especially with the extras, and especially if all the patterns and other switch features work properly.