Have one question on this one

I was able to identify this as a 1 Cash - Daoguang (Boo-ciowan) 1821 by the ideograms however the coin pictured on the site is listed at 24mm and the one I have is 22mm which is the same measurement as the 1 Cash - Daoguang (Boo-yuwan)  (1821-1851) but the ideogram on the right on the reverse side of the coin is slightly different. I noticed that there are a few in that immediate time frame that are not pictured. Is it possible that what I have is one of those?




For comparison:
https://en.numista.com/catalogue/pieces26024.html

https://en.numista.com/catalogue/pieces12421.html


Thanks for any help you can offer