This white calf Accutron strap, sold without buckle, is compatible with all Legacy watches with a 14mm buckle (styles "521", "505 Alpha", "565 and 203 football watches" and the "412" - shown below). This style is standard 80 + 123mm length.
Standard (80 + 123mm)
White Calf (14mm)
Compatible Models
HOW TO CHANGE A STRAP