The Pocket watch clock is based on an earlier design (Clock 9), which used a spring to drive the mechanism and was designed to be made from wood. This clock, on the other hand, is smaller and designed to be built using 3D printing and is driven by a Quartz motor, which simplifies the design by reducing the number of parts needed and, as a bonus, makes the clock more accurate. It also enables the clock to run continuously for several months.
By using a Quartz drive, the whole clock is simpler to make, so it is ideal if you have limited time available to dedicate to the project.
The STL files supplied for the 3D printer include 2 dials, one with normal numbers and the second with Roman numerals. If you are not able to change the filament to a second colour to print the numerals, then the detail drawings provided include scale versions of the two dials for printing and sticking on.
You can purchase the STL files here for $10 to use on your 3D Printer. You also, get the STP files so you can make any changes you require to the design. Files to a 3/4 size version are also included in case the original is too big for your printer.
To view the instructions for building this clock view the pdf here.
To print only a single item of the drawing to scale using Adobe Acrobat Reader, do the following:
Go to Edit, then click on Take a snapshot, move the cursor to the top left of the item you want to print and hold down the left mouse button whilst you drag a box around the item. The inside of the box turns blue and you can now go to File and then click on Print. This brings up the print dialogue, make sure Selected graphic is selected and that the Page scaling is set to None and the click on OK. As long as your printer is connected you will have printed the item at size. Do this for each item you want to cut out.