5 fen Manchukoko evaluation [opgelost]

I have coin that seems to be 5 fen Manchukoko 11 year. 

N#31351

Asking for its evaluation, it has strange defect on obverse - is it a mint error or post mint error? 

In ngc site for this coin years 11 and 12 are listed while in numista just 10 and 11. 

years 10-11 for the aluminum Y# A13 and years 11-12 for the fiber Y# A13a N#22470

rsirian1

years 10-11 for the aluminum Y# A13 and years 11-12 for the fiber Y# A13a N#22470

You are correct, I see it now. 

Mine is aluminium. 

I can't find ngc page for it. 

https://www.ngccoin.com/price-guide/world/china-japanese-puppet-states-manchukuo-5-fen-y-a13-kt-10-kt-11-cuid-1068453-duid-1309584

Thanks, the prices here are more reasonable. 

What do you think about the defect on my coin? Is that a post mint damage? 

Could be a planchet defect/laminations but I suspect it a result of corrosion causing the blistering/delaminations.  

The coins of this period are notorious for these linear defects and because even UNCs look like that I would guess they used or overused shitty dies. Or the aluminium planchets were the issues I am not 100% sure about that because the defects also go over some devices.

Coins without them have a high premium.

Interesting, so would you grade it as Fine or Very Fine? I understand the value would be about 3-5 dollars? 

Personally, I would set it on the low end of that estimation because of quite some wear and several deep gauges in combination with the distracting planchet issues.