Clock are my weekness… ;)
Some time I looking for atmel GAL atf16v8, but found this very simple clock and single side board. Of course I order this one. I think it should be good lessons for soldering for my old son. Yep, he is solder it in a hour. As clock it very bad (mostly because bad firmware with many drawbacks), but I left this clock in my collection.
Additionally I add usb wire to power it.