Corum Watch Goldem Bridge Titanium Gold Diamonds B313/04280. In celebration of the 10th anniversary of the Automatic Golden Bridge, Corum takes another leap, unveiling a new Automatic Golden Bridge series with Avant Garde case that delivers sweeping views of the meticulously finished movement. The tonneau shaped case offers a dramatic view of the movement thanks to the panoramic sapphire crystal and case back in a larger size.