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From what I could see after some quick and dirty camera angle corrections in PS, it should be somewhere in the common range (I read around 75° for both).
Headtube is 19.5cm by the way.
I have another bike (yes, I am a notourious T-Rex collector, five in total), a track frame, which is 62cm c-t as well with a 56.5cm top tube, and it has a 21cm headttube:
https://www.lfgss.com/conversations/276867
jetski
TurtleRecall
Find out what seat tube angle is first.
Usually if it's very steep, it's realistically 54cm, or even 56cm.