This door divides our kitchen from the front rooms of the house. It's closed and sealed until restoration of the three front rooms is complete.
It's not original to the house. The only doors here when I bought it, in 1986, were hollow core luan. One of my first tasks was to replace every door with on that is historically correct.
When we first saw this door, leaning up in an antique mall booth, we had to have it. Not only are the color spectacular, the yellow nearly matches the kitchen trim.
There are a couple of things to notice here. Humidity plays a huge role in how wood acts, how it can be put together and how finishes look and act. In a door like this the green wooden panels float between rails and stiles. They are allowed to float so that they don't split when the humidity drops -- and wood shrinks -- in the winter. The bare wood reveal around the perimeter of the panels might indicate that the door was originally painted in fairly humid conditions when the panels had expanded to full width. In the winter -- when the furnace kicks on -- household humidity plummets and wood contracts. In this case leaving bare wood around the panels.
The bumps and dings on the door are constant with doors in service areas of the house -- kitchen, pantry, basement or a back door. Many of these dings might have occurred as folks pushed open the door and dragged tools, boxes or other large items across it. My back door has similar marks from my backpack. My mother complained about my trombone case and doors over 40 years ago.