If he were the groom, most would say let him wear his blues. Since he is the best man, he should wear the appropriate suit/tux that others would in the wedding party. If the maid of honor had just graduated boot camp would she be in her blues? Don't think so, and she would be just as proud of her blues as he would be.
Wedding Bell Blues was created in 1969-09.
No, you are no longer authorized to wear the Marine uniform. You have to be retired or discharged on disability to continue to wear the uniform. And you are not in the Marine reserved because you are in another service.
Wedding Blues - 1920 was released on: USA: 28 November 1920
The cast of Marine blues - 1986 includes: Eliane Rocca
Wedding Bell Blues - 1996 is rated/received certificates of: Australia:M USA:R
Dallas - 1978 Wedding Bell Blues - 12.16 was released on: USA: 24 February 1989
Dateline NBC - 1992 Wedding Bell Blues was released on: USA: 22 February 2000
ALF - 1986 Wedding Bell Blues 2-4 is rated/received certificates of: Australia:G
Cybill - 1995 Wedding Bell Blues 2-17 is rated/received certificates of: Argentina:Atp
The Parkers - 1999 Wedding Bell Blues 2-1 was released on: USA: 4 September 2000
The Parkers - 1999 Wedding Bell Blues 2-1 is rated/received certificates of: USA:TV-PG
Hardball - 1989 Wedding Bell Blues 1-15 was released on: USA: 1 June 1990