The Special Club concept started in 1971.

A dozen of wine growers from some old families of Champagne had an idea to familiarize people with the originality of the “Champagne de Vigneron” (Champagne of wine grower), thanks to prestigious vintages.
In the beginning, they created an association called the “Club des Viticulteurs Champenois” and chose a bottle with a special shape created only for them.

In 1988, they changed the bottle and the label. The current packaging has been the same since 1988. In 1999, the Club changed its name to “Club Trésor of Champagne”.

To be a member of this Club, Champagne producers have to elaborate their Cuvées in their own facility, meaning the pressing, bottling, ridding, disgorging, etc., have to be done at the domaine/estate. Then, only the Recoltants-Manipulants are accepted.
Everybody has to respect the Club’s rules to ensure the quality. These rules include:
* Only vintages
* Two tastings to control the quality: the first one after the blending, when the wine is still “Vin Clair” (juice) and another after the 3 years (or more) of ageing “sur lattes”.
There are 26 members, each of whom can produce his Special Club with his own techniques: 
* blending or “monocru” (only one grape variety)
* “blanc de blancs” or “blanc de noirs”; ageing from 3 to 10 years, brut or extra-brut.

dosage : 6 grams per liter
ageing : 6 years on laths
Even if it doesn't say on the label, 100% of the production is RD (Recently Disgorged)

"(all chardonnay from the grand cru Chouilly) Light yellow with a faint green tinge. Spicy, mineral-driven aromas of Meyer lemon, orange, toasted grain and white flowers, plus a hint of anise. Dry, sharply focused citrus and orchard fruit flavors are complemented by talc and honey, with zesty mineral lift and back-end grip. Very young but lively and easy to drink, with gentle finishing fruitiness and excellent length. (I retasted the 2000 Blanc de Blancs Brut and it is showing very pretty, mineral-driven citrus and floral character, with good finishing cut and grip. It is evolving slowly and looks set for a long life in a cool cellar.)
- Stephen Tanzer's International Wine Cellar (Dec. 09), 92 pts

"This 100% Chardonnay displays a yellow-gold hue and aromas of honey, grilled nuts, and minerals. On the palate it has a soft creamy texture with orchard fruit, grain, and autolytic flavors. It is bright and crisp with a clean mouth feel and has a long persistent finish."
- I-WineReview.com (December 2011), 92 pts

"A tightly knit, vivid Champagne, with a supple texture and vibrant acidity buoying its apple, yeast, lemon and savory flavors. This has substance and class, if balanced on the sharp side. Give this time or enjoy with shellfish and oysters. Best from 2011 through 2018. 300 cases made. –BS"
- Wine Spectator (Web Only 2010), 90 pts

"In perfect balance now, this is a great expression of mineral-driven Chardonnay. Its acidity is a vehicle for the crisp flavors of pear and lime, with a hint of ginger. It's still young, so drink it now for its great fruit, or age for four more years."
- Wine Enthusiast (December 1st 2012), 92 pts+ CELLAR SELECTION