A Precious Moment for Watch Collector to Watch

This might be one of the moments that every watch collector would like to see... the last day of February whereby his Perpetual Calendar watch will switch from 28th February directly to 1st of March...
Well, the leap year would have to be the precious moment as only one day in four years we can see your mechanical watch would change from 29th February to 1st of March... How do they do that? Well, there is some genius making some small and tricky mechanical switch that allows the date to jump from 29 to 1...

That is a very smart mechanical invention!

HK Snob