no markings on the back,
a person more familiar with these told me its dated 1653.
I thought replica because it is so pristine, like it was minted yesterday, however they are apparently very common and this grade is not a rarity (or even all that valuable)
I'm a little ticked off with the
ebay seller, they had it attributed as Vietnam 1 phan. they reluctantly offered a refund for the cost of the coin but I am out the $8 tracked shipping AND return shipping if I decide to send it back.
I think I'll just nail it to the wall as a reminder to attribute for myself (or ask for better pictures) before buying...