[mherdeg]

Reading this writeup, the procedure takes up to two minutes:

* each person in the room pulls up the stem when their individual second hand is pointing at 0, and also sets the time to the prearranged hour/minute,

* then everyone waits a bit longer until this is done;

* after another minute, everyone pushes down the stem simultaneously

Is there an alternative where you could have some way to force your second hand to the 0 position rather than waiting up to a minute for it to get there on its own then freeze it?

I do see why hacking is nice for time zone changes.