Geo-clones in cultivation

There are following geographical clones of S. grandiflorum known to be in cultivation:

Breuil-Cervinia, 2.000m (Italy) GDJ.96B.06
Campiglia, 1.800m (Italy) GDJ.97B.25
Gran Paradiso (Italy)
Kerguelen
Pecceto di Sopra
Piamprato, 1.500m (Italy) GDJ.97B.15
Piamprato, 1.600m (Italy) GDJ.97B.16
Piamprato, 1.950m (Italy) GDJ.97B.20
Valle Locana PH1175
Valle Quarazza Typ A PH1157
Valpine
Valsesia, 1.200 m, Piemonte (Italy)
Valsesia, 1.920 m, Piemonte (Italy)
Valtournenche, 1.800m (Italy) GDJ.96B.13

Balme mt1600 TO,ET148,Italy
Bois de clin-Rovenaud 1420mt AO,ET115,Italy
Carrè 2000mt AO,ET128,Italy
Lillaz/Val die Cogne/Valle d'Aosta (I)
Pian della Mussa mt 1800 TO,ET149,Italy
Rifugio Ciriè mt 1900 TO,ET147,Italy
Weissmatten-Punta Regina mt2100 Gressoney AO ET193
Champorcher: Petit Mt. Blanc 1900m I-AO CW 8640
Valle Quarazza I-AO BZ 7812B

Does the "TO,ET147" stands for field collection number or what?

The abbreviation TO belongs to the place name. It refers to the Italian province of Torino, like AO refers to the province of Aosta.
And ET, of course, refers to our good friend Ento, Ennio Toso, member of this forum.

From Martin Haberer's list:

- Aosta
- Cogne
- Grauson
- Lillaz (= Lillaz/Val die Cogne/Valle d'Aosta?)
- Monte Cervino
- Nivolet/Aosta