ERTE "DEGUSTATION" COURVOISIER NO. 5: Sealed Romain 'Erte' de Tirtoff "Degustation" #5 Courvoisier Collector Cognac bottle in fitted presentation box with complete legacy booklet. Bottle Approx. 10" h x 6.5" w. Box Approx. 11.75" h x 8.25" l x 3.5" w. The Russian-born French artist Romain de Tirtoff, also known as Erte (born in November 1892), designed the bottles of this limited edition. The visuals present the 7 steps of cognac making. The blends consist of rare Grande Champagne eau-de-vie, some of them are from the end of the 19th century, when Erte was born. Erte set prices can range from $8000 to $20,000.