I just acquired this gold noble of British king Henry VI. I can translate the obverse: HENRIC DI GRA REX ANGL Z FRANC DNS HYB "Henry (VI) by the grace of God king of England and France Lord of Ireland The reverse is beyond me. IHC AUT TRANSIENS PER MEDIUM ILLORU IBAT The Internet yields nothing but jibberish and my trusty volume of England's Striking History covers silver coins and does not do much with gold. I would also like some help with the mint. Thank you to anyone who can help. This was a coin for royalty and the wealthy. It was worth 6 shillings and 8 pence which works out to 80 pence.
This page looks convincing to me: https://www.mintageworld.com/media/detail/2566-gold-noble-of-king-henry-vi/