This is what I like to call the first official drawing of the character - Humphrey - from my current webcomic set in the Overwatch universe, although he went through many, many redesigns before getting to this stage. I've posted a link to the full project where you can see all of his development.
https://www.artstation.com/artwork/3oq8wE
His initial design was a lot more cluttered than this. Then I received some feedback from Renaud Galand (lead character artist on Overwatch) and was able to push his design even further and get rid of the stuff I didn't need. He also earned a set of music note antennae (being a robot that doubles as a music box).
As for his most recent drawing... well the comic is still very young so his design hasn't actually changed at all