The Swiss family Amez-Droz purchased the domain in 1989. 
Jean-Marc Amez-Droz still lives in Bern Area, Switzerland - ‎Consultant indépendant bei Jean-Marc Amez-Droz - Management et Marketing du Vin.
The property is situated at the the foot of Dent de Signac and covers a total of 90 ha of which 38 ha are with vines. The rest are wooden land around the chateau.
It was an owner before Mr. Amez-Droz who after 1961 increased the area with vines from 4 to 38 ha. Therefore the vineyards have quite a high average age.

Wines according to website August 2015

Cotes du Rhone Village Chusclan Rouge Eté
2012: 60% Grenache, 30% Carignan and 20% Syrah.

Cotes du Rhone Village Chusclan Cuvée Tradition
2013: 45% Syrah, 40% Carignan and 15% Grenache.

Cotes du Rhone Village Chusclan Combe d'Enfer
2012: 42% Grenache, 31% Syrah, 11% Carignan, 10% Mourvedre, and 6% Counoise.

Cotes du Rhone Village Chusclan Cuvée Terra Amata
2012: 52% Grenache, 42% Syrah and 6% Mourvedre.
Aged in cement tank or barriques for 15 months.

Cotes du Rhone Village Chusclan Cuvée Secret
2009: 45% Syrah, 45% Grenache and 10% Mourvedre.
Aged for 18 months in new barriques.

Cotes du Rhone Village Chusclan Rosé Cuvée Dona Clara
2010: 60% Grenache and 40% Mourvedre.
Grenache are direct press and Mourvedre saignée.