1. A Bolder Peak
Every suit featured here has a peak lapel (rather than a notch). It's a crucial part of the bigger personality of the DB.
2. A Wider Lapel
The rules of double-breasted are different. Get used to a wider lapel than on your single-breasteds. That's part of what gives you that updated 1970s vibe you're after.
3. Six Buttons, of Course
We're classicists on this front: In almost every case, we like a six-button jacket. To see the one exception, check page 175.