Cash coin [solved]

Can anybody advise on the coin below,

The four characters in the second photo match a Korean mun. It's a "Sang Pyong Tong Bo" coin, of which there are many varieties.

Some examples of this type of coin are at

http://primaltrek.com/koreancoins.html

However, I haven't been able to find a match for the other side. I believe the single bar probably means one (one mun). Perhaps someone more knowledgable on Korean coins will be able to help. As always, a weight and diameter might help with identification.

Quote: "Seeker55"​The four characters in the second photo match a Korean mun. It's a "Sang Pyong Tong Bo" coin, of which there are many varieties.
​
​Some examples of this type of coin are at
​
​http://primaltrek.com/koreancoins.html
​
​However, I haven't been able to find a match for the other side. I believe the single bar probably means one (one mun). Perhaps someone more knowledgable on Korean coins will be able to help. As always, a weight and diameter might help with identification.

​Thanks for the lead, eventually I deciphered the cash coin to be

​​​​One (1) sang p'yong t'ong bo coin, Oyongchong, Special Army Unit
Korea, 1678 - 1695

营 or 營 Oyongchong Special Army Unit 1678

Character on reverse
Oyongchong, Special Army Unit,
1
Flood