I ll try to be as detailed as I can.
How do you know when your book will be ready in the bookbinder?
Of course you will see the indicator. But when? In 1hr? in 1day when?
You don't check every two minutes if the indicator appeared... You click on book binder and it shows: Next book will spawn in xx Hours.
So after xx hours you can see the indicator too.
Same with mayor house. If you click on collections tab it gives the
remaining time for the production to spawn (eg 1hr)
so in 1hr the indicator appears.
So what I am saying is that the tree has no visible timer (click or mouse over) for when the next present will spawn.
I have to constantly watch for the indicator.
Hope I help