I say 38 years because that is how long I have been involved in the the sport, first as a competitor, a coach and a boxing equipment designer and retailer. Below is a classic late 70s to early 80s boxing glove

               1980 boxing glove

As you can see the most prominent feature of this glove is the thumb and how far it protudes, this is one of the biggest causes of injuries in the early 80s, the main two were thumb being cause by the thumb being pulled back as you threw a punch and hit a fore arm, elbow or hand of you partner. Most of the injuries happenned during sparring