I picked this up on eBay a few weeks ago. It was reasonably priced and supposed to be original. It was recently serviced before I got it. The problem is... It's hard to wind. It's not right. The movement does look correct but the crown is awfully small. What do you think? It is running well and keeping good time.

I've also added the photos from the auction.

 

I would say your crown is original.
I find wrapping an elastic band around my finger helps when winding these small crowns.
Also try removing the crown and putting a small amount of silicon grease on the outside of the tube.

 

Here is mine. Is it the same?

 

Yours looks the same. it's just insanely small. I'll try the silicon grease suggestion along with the elastic band.