People are only just realising why suit jackets have extra buttons on sleeves - Daily Star
Men's Jacket Sleeve Buttons - Why Are They There? A Little Bit Of Menswear Style History - YouTube
Sleeve Hem Button Options for Jackets and Suits - Proper Cloth Help
Tailors of Distinction - Whether they are are functional or not, a suit jacket will have buttons on the sleeve. A suit jacket with sleeve buttons that come undone (surgeons cuffs) is