1980s The Coach® logo is stamped above the creed and the word “LEATHERWARE” is printed in all caps under the word “Coach” within the logo. Coach® Creed is the same as in mid to late 1970s. Serial number contains seven numbers in the format: xxxx-xxx. Both the first four digits before the dash and the last three digits after the dash are unique to each bag and do not correspond to the style number.