some of the chinese fakes do actually work and identical to the original but since their date code is also old they ma not last that long
I also got several fakes that didnt work until I got this one that worked as yours does. The fakes that didnt work are visibly larger in size than the original one
I also got a fake one that worked perfectly fine as DS1742 but not as a DS1742W !
but I am surprised that why your clock is not working. The chip that I got worked. But as I said the date code is already 12 years old so it may not last
assuming that it is a real date code!
as far as I know the hours are stored at those two places. when I changed both to a new number the scope showed the correct # of hours
