He makes about any kind of string you can imagine as they are all hand made to order. Here are two slightly different lists of his "standard models" that were posted over on the "other" forum:

1. sonores DRAGO SOLO modernes Solospiel (auch in Normalstimmung spielbar)
2. sonores DRAGO BASSO modernes Orchesterspiel
3. sonores TWINE alte Musik/(mod. Orchester)-
4. sonores HELIX Jazz pizz/arco, alte Musik
5. sonores CORAX Jazz pizz/arco, alte Musik


CORAX -thick black gut for Jazz (bowing easily)
HELIX -helix wound medium gut for Jazz (bowing easily)
TWINE -thin gut core, roundwound with metal for jazz and bowing
DRAGO solo -thin gut core, roundwound with metal for modern bowing
DRAGO basso -thin gut core, roundwound with metal for modern bowing
RED LABEL solo -man-made core roundwound with metal for modern bowing
RED LABEL basso -man-made core roundwound with metal for modern bowing

The only two players I know of using his strings off the top of my head are Christian Weber in Switzerland and François Rabbath in France, although clearly there are others.