Oval Toroid

I was digging through my stash of transformers for something to power a DAC regulator and I found this old Antek. Apparently, when I bought it years ago, I never really looked at it, but it is definitely oval in shape. I would love to hear if anyone else has ever had something odd like this and if you would even use it?

The windings are all tight and visually uniform. The thickest part is 36 mm and the thinnest is 30 mm, so a difference in thickness of about 6 mm. My guess is that the core is the cause, but I don't know.

Any thoughts?

Jac
 

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It’s not oval. It just has something under the noise shield. Maybe just a thermal fuse or group of leads all coming out in proximity giving it a “bump” on one side. The clue is the hole in the center, which is round.