Just wondering if someone can tell me . . . . . .about hangtags? . . . I'm just learning about coach and I see hangtags in a lot of different materials. Just wondering why some are in metal, some are in brass, some leather, etc, etc . . . ? Is there some signifigance to which material is on which model ? . . . or what ? . . . Any tidbits of info on hangtags??? Thanks!