Citizen Crystal Seven Brown Grey Dial 1960s()1967 Brand: CITIZEN Model: Crystal Seven Ref: ACSS 2928 Y Serial: 70510036 Year: 1967 Movement: Automatic 21 Jewels Case: 37mm Material: Stainless Steel Strap: 18mm Includes: Leather Strap Description 1965 ()7 5 100 43 CITIZEN ~1 Warranty 20191OH6 () () Description Crystal Seven is the first thin automatic watch with day and date function in Japan. It was revealed in 1965 and sold more than 100 million pieces in the end of 1966. 4 5 variations were