CALENDAR CLOCKS:
A very important word about calendar clocks. DO NOT EVER OIL
THE CALENDAR MECHANISM;EVER. YOU WILL RUIN THE MECHANISM
IF YOU DO. They work on gravity power and they do not need oil! This applies to double dial types old and new. The types that have the calendar on the main dial
are a different story. They can be oiled but don’t need oil particularly; however if
there is a separate mechanism, be careful, if it works with a lever and depends
on gravity to work don’t oil it.