All three of my Teiscos are wired like the 1st diagram - 2 tulips and a hollow body, all have the same pups. I'd like to hear a phase swicth on one of 'em, that's an easy mod.
When you're doing a wiring project involving these old chrome-capped pickups, I most heartily recommend wax potting the things. It's simply a massive change in playability at mid to high volume levels. It cuts the squeal almost completely, even with a compressor or gain pedal. I have one potted and one stock tulip; you have to be in constant control of the non-potted guitar, just a nightmarish amount of string muting and volume-rolling.
My potted guitar has a bit less output, but the non-potted one is ridiculously hot so I see the wax as a plus there as well - though that could just be inherent differences in the pickups themselves (though they appear exactly the same build-wise).
My overall take on the pickups though (heresy, I know) is replace them with P90's - you get everything cool about the teisco - the funky style and that sort of woody-yet-gritty sound - but it's like taking a blanket off your speakers - there's a wonderful articulation of the notes with a really unique tone curve (from the 40 year old plywood maybe?) which takes the Tulip from an oddity with a one-trick-pony tone to a really useful and unique instrument you'll reach for often.
Check out the guitar solo tones in this video - there's nothing from Gibson or Fender that sounds quite like this to me. (I used surface mount P90's on this guitar and shimmed the neck a solid 1/4" making it nearly unplayable, so the rhythm/chords lack some sustain - I'm going to route this guitar for HB mount P's and make it a little monster).
http://www.youtube.com/watch?v=9MmJEnA7RDk