The company was founded in 1988 by Aletta Francoise Frédérique Stas-Bax and Peter Constant Stas. Its name is derived from the names of great-grandparents of each founder – specifically Frédérique Schreiner and Constant Stas, the latter of which founded a company producing watch dials in 1904. Model: Frederique Constant Classics Auto Moonphase Automatic FC-330MC4P5 Men Period: 2011- present Case Material: Yellow Gold Plated Steel 2part case with see-through back Case size: diameter 40mm (w/out crown) Movement: 26jewels Automatic Swiss Made in-house caliber FC-330, 28,800bph, 38hrs power reserve based on the Sellita SW200-1 Silver Dial, clous de Paris decoration, Roman Numerals, Moonphase display at 6 o'clock, Hand-polished black hands Original brown leather strap 21cm long Sapphire crystal glass Water Resistance : 6 ATM Never worn in mint condition in its original box with full set.