Relatively new

[Gregory5]

Yes. Then cropped

 

[Scrubcadet10]

Those are really good close up pictures too. Phone?

Hubbell space telescope ?

 

[upupandaway]

I have a engine pulley off my Case Skidsteer that cracked like yours. I just had the crack welded. If the flywheel is aluminum, that's nothing. If it is the magnesium then it might be difficult to find a welding shop - it was for me and my BG75 mount breaking off.