Not as tricky as I thought but I would say it is 53 to 55 in my opinion. Some luster along the rim of the coin that my photography skills failed to capture. So here it is
NICE COIN! I almost went 45 after looking again. I usually judge EF-AU by how flattened the cheek and wheat grains are....but those grains are hard to see in the OP. The cheek looks more EF but it's a 24D (all pretty weak there). Great woody you snagged!