Dao Guang Tong Bao - please help with mint and type

hello,

I have this Dao Guang Tong Bao coin with unusual (I think) calligraphy, but I can't define a mint. Can somebody help me?
Weight is 3,5 g, diametr is 22,3 mm

Mintmark very corroded but to me looks most like Boo Ciowan (Board of Revenue). Could conceivably be Boo Yuwan (Board of Works) but I think this is less likely. You can compare them here:

http://www.calgarycoin.com/reference/china/china8.htm#tao%20kuang

Thanks for the opinion. I compared to some of the coins from these mints, but didn't find similar style of the symbols.... Will look at your link more carefully

What a difficult coin
You won't find it in the standard Dao Guang coinage !
The most approaching coin I found with such a calligraphy was minted in Eastern Turkestan :

Good luck

Hello

Why not Boo Je
with hartill #22.645
it's quite the same diameter
some difference but local type so...

Citeer: "gros"​Hello
​
​Why not Boo Je
​with hartill #22.645
​it's quite the same diameter
​some difference but local type so...

​Interesting : the "guang" character is similar on some of this reference with this surprising angle on top right, is there what they call a "local type ?"
but the head of "tong" is square

and for the "costal type 22.646, there is no broad rim
so ... it's not in the DH#22.* but likely in DH#28.* and now it's another story to find the reference book :)

yes
i have seen that the head of the tong was square
and the Grinya 's coin as the same tong of the 22.646 ???
Don't know where to find the DH#28* except on Zeno

Perhaps in the second edition ?

No got this one but finishing about 25.*

You might contact Ollisaarinen or Cycnos, who get this last edition.