Hello Alfredo, it's a modern S&G dial, so if you have a three number combination then it suggests it'll be a 6730 series 3-wheel lock.

Try 4 turns anti-clockwise to the first number, 3 turns clockwise to the second number, 2 turns anti-clockwise to the third. Then slowly turn the dial clockwise- if it works the lock will pick up and the dial will come to a stop and the lock should be open. Good Luck.