No, people are assuming (probably correctly) that Brian SD is saying TOJ jackets are based on the 5 zip. If that's the case, the claim is incorrect. Stock TOJ double rider jackets, for better or worse, are slim and balanced in measurements. The 5 zip is cut like a classic perfecto: exaggerated shoulder, medium arms, tiny torso, incredibly short. I've owned multiple 5 zips and sold them because of their cut, and handled more. I've handled new and old ones; the cut was always the same. I've also owned multiple TOJ jackets and handled stock ones. And before anyone else asks, TOJ has categorically refused to do a full 5 zip replica. Now, back to the Thurston Vanson SF MTO.