Tobacco Tin Clock

Gentlemen:
My fist tobacco, in 1962, was Dunhill's 965. I recently bought a tin and used it to make a clock. It is very easy to do and is quite original. (I would download a picture but don't know how. You can see it at www.anthonymagarello.com on the "Woodworking 2012" page.) What you need is a drill and bit to open a hole in the cover for the mechanism to fit through, and a clock kit. Kits are less than $10 dollars and take a AA battery. Once the clock mechanism is installed on the tin's cover with the provided nut, you can screw the back and front of the tin together and hang it on a wall or create a stand for it.
I bought my mechanism from Klockit.com, but there are other sites. [Send me a PM for my email address,] if you would like a plan of what I did. (If you know how to upload pictures on this forum page, please let me know.)
Anthony
Edit: Removed personal email address from post. L.

I used a compass. You can measure the diameter of the tin's cover (at the widest part)and draw a light pencil line. Draw a perpendicular line to that line at the center. Then set your compass at the point of intersection. Rotate the compass to see if it stays on the tin. Adjust the compass point until its pencil matches the circumference of the tin's face.

Or, you can turn the face of tin on a sheet of paper using it to draw a circle. Cut the circle out. Fold the paper in half and then in half again. Unfold the paper and place it on the face of the tin. Place a nail at the center of the creases and tap it with a hammer. That spot is where you drill, probably a 3/8" hole, depending on the clock mechanism.