In my experience these are harder to find than Gold Celtic. Dad, a couple of years back had that same coin, the next year, from the same field I had Half Noble We have yet to find any other Gold Hammered. :P
It looks like you have found most of my early top 5 wish list finds, I have now added Roman Gold to near the top (along side the still standing Saxon Gold). Don't tell me you have had one of these as well