This is a fast, relatively simple project that can be completed inside of 3 hours if you move quickly and don't make any major mistakes. Further you can plan around irregularities in your workpieces allowing for greater ability to use scraps.
3/4 inch pine
Step 1: Cut Peices
2 9x12" boards
2 3x12" boards
1 tapered 2,1/2x32" board, tapering out to 3,1/2"
5 3x24" boards
16 3,1/8x3 boards
10 3x1" boards
Arrange your materials neatly, affix the 3x12" boards to the sides of one of the 9x12" boards creating a notch in the middle
Step 2: Check Your Taper
Step 3: Dry Fit, and Then Glue, Bars and Risers
Step 4: Mark Gaps With Grease Pencil
Step 5: Add Stoppers
Step 6: Cut Notches in 24" Boards
Step 7: Add Guides, Lines, and Numbers
Use the 10 1" pieces of wood to cap each bar, so that they cannot slide out.
Use the remaining pieces of wood to construct a guide for the tapered piece of wood to prevent it from skittering about, note that one board will have to be cut as shown so admit the screws.
CAREUFLLY look inside the mechanism so that you can see right through it (IE- all notches are lined up), and draw a line on the side you are keeping your marks on with your red grease pencil. Then slide all off the bars out and put your numbers on. You can see that the combination for this lock is 3,8,3,8,3 (Hopefully none of the food thieves I am trying to keep out of the fridge read instructables!)
Slide the lock bar into place multiple times (screws facing down) in order to make sure that you have not shifted anything while applying your numbers and lines- if you find that one has shifted and is marked incorrectly sand and then reapply.
Step 8: Zero, Test, and Then Mount
Then put the code in and try sliding it out again, do this 2 or three times, just to make sure that there is not a burr in there or something similar that will prevent use.
Then mount it wherever you need your stylish, functional, wooden lock.
Thanks for reading this instructable, hope that this gets the creative juices flowing.