Since the case number is stamped in small characters, it may be difficult to read. What is Movement number? A case number (A string of 4 and 6-figure numbers ie. xxxx-xxxxxx or a string of 4 and 7 alphanumerics ie. xxxx-xxxxxxx) is stamped on the case back of your watch.The first 4 characters of the case number is the movement number. Notes for Manuals: The images for explanation may look different to your watch but the functions will be the same. Case numbers are classified into the following two types: xxxx-xxxxxx (Example) 9447-H29581 xxxx-xxxxxxx (Example) F315-K000131 Using the alphanumerics below click on the first digit of your movement number and then select your watch. Notes for the movement number: The location of the case number of each watch depends on the characteristics of that watch. Manuals for our past models, as well as new models, are also shown below.