The usual lock in that safe is a 4 wheel lock, that if set on 4 different numbers, the dialing sequence is 5L-4R-3L-2R-1L to stop. Since you have only 3 numbers, try 5R-3L-2R-1L to stop. But your instructions are saying Right to stop, so also try 5L-3R-2L-1R to stop. Note that it is 5 times then 3,2,1. It is also possible that the comb is off a bit. And also possible that comb is for a another safe. And also possible…