if you take the bearing out, align a short ruler against the angled part of the bearing, look at it from above over a piece of white paper, you will be able to assess if its 36 or 45.
The credit card trick is a good way of checking for 45 degree simply place the corner of the card through the bearing creating a V as the sides of the card are 45degrees the card will rest on the bearing with no gap if it’s 37 there will be a gap
I've managed to fix the play in the headset - it was an issue with this plastic ring.
No sign of angle on the headset sadly, but it is campag.