Ottoman Empire coin question. Is this my coin?

I am a lot confused with this coin that I got today.

I am strongly inclined to think that it is this coin:
https://en.numista.com/catalogue/pieces24469.html

But mine (pictures below) have some differences:

• Numista description of the coin says: "Toughra with flower within tulip ring"​. I see the flower on my coin is pretty different.
  
• The 4 dots above the date on the reverse also are in another place.
  

My 2 questions:

- Is the KM# 653 my coin?
- There are 5 years to choose from (1839 - 1843), how do I know which years is mine?

Thank you all for any comment or answer,
Geison

I'm not sure about the slight differences in the engraving, but I can tell you that you determine the date by the regnal year, which is at the very top of the reverse. Your coin, like the Numista coin, shows ٤ (4), making the actual date 1258 (1842) - the fourth year of the reign which began in 1255 (1839).

Thank you Jesse, at least now I know the correct year.

Sorry for the bad pictures, poor cellphone camera =(