CLOSED it was 396 and Perfectplayer6 won it!

This game is easy enough! There's a vault with a prize in it. I forgot the combination to the vault! If you can guess the combination you win the contents of the vault. The vault contains Steampunk Stamp.

Rules:

The combination is 3 letters long.

The combination may contain any numbers from 1-9. There are no 0s in the combination.

You may guess only twice each day.

Make your guess in the comment section.

I will start off with 2 clues given.

More clues may be given as time goes on.

If the vault code is uncracked the prize will remain inside of it until there has been no activity for 5 days. If that happens it will then remain mine.

Tips:
The first number is NOT 9

No digit repeats. (so it can't be 121 for example)

The combination contains 3 of these numbers: 1, 3, 4, 6, 7, 9

Incorrect Combinations:
123 (can't say if any were right as guess was made before I clarified it's a 3 digit code)
196 (can't say if any were right as guess was made before I clarified it's a 3 digit code)
258 (none are right)
357 (1 number is right)
459 (1 number is right)
586 (1 number is right)
831 (1 number is right)