
If it has no center bar the Lexan module is a SW version MK III or IV only.If the lexan module has a Lexan/plastic rod down the center then it is a MK III SW.Your info leaves only one question really. Does the Sr # on the right side adjacent to the display begin with the # 4? If so then you have a MK IV.Most likely there is something wrong with yours other than the battery or the person that took it apart would have likely plopped some batteries in it and sold it that way. Hope this helps you identify it.
Is the chip in a package or is it exposed under the silicone?Howard