Unveils New Larry O' Brien Trophy

After 45 years, the NBA's Larry O'Brien Trophy is getting a makeover.

The league just debuted the new-look championship trophy on Thursday ... showing off Tiffany & Co.'s redesign of the iconic award.

The new trophy won't differ too much from its predecessor -- its size, shape and weight will remain the same -- but there are some awesome new features to spice up its look.

For instance, in honor of the league celebrating its 75th anniversary, the new LOB trophy will have the names of the first 75 NBA champions etched on it ..., and moving forward, the name of each champion's name will be added to the bottom disc.

The trophy -- formerly known as the Walter A. Brown trophy -- was named after then…