I love pinhole stuff. Actually, I'm a blur-fanatic... But that looks amazingly sharp in places for a pinhole. I'm not sure why some parts are more in focus that others when a pinhole, has a standard high f number Can you explain what kind of pinhole it is? Did you temporarily convert a digital into a pinhole?
I would say pinhole camera and a lot of skill. This is a refreshingly different look, which you have captured beautifully. Congratulations on either your "luck" or your skill.