Most of our clocks have been temporally set to out of stock. Their main ingredient is the 74LS90 BCD chip. The last batch of these chips that we got are very different than the same chip from a few years ago. The propagation time or the parasitic capacitance in these newer chips is so different that it caused our clocks to do all sorts of strange things. All of the clocks that use this chip will remain out of stock until we can get the bugs sorted out. Sorry for the inconvenience!
