Iran 2009 KM1270 or KM1270a

Problem: in the site
"Central Bank of the Islamic Republic of Iran"
http://www.cbi.ir/page/1992.aspx
I only found this description:

250 Rials
Description
Denomination: 250 Rial
First Issue: Feb, 2009
Obverse: Denomination in middle, Islamic Republic of Iran above and year of minting below. On either side a wheat sheaf.
Reverse: Feizieh School.
Weight (gr): 2.8
Diameter (mm): 18.8
Alloy: Cu-Ni-Al

In the Krause World Coins exist only KM # 1270.
Then I think the coin KM # 1270a DOES NOT EXIST.
https://en.numista.com/forum/smileys/pleurant.gif

Someone more experienced can help me.

Moved by ZacUK from Numismatic questions to Coin identifications and valuations

This is the only reference I could find:

http://www.catawiki.com/catalog/coins/countries/iran/2996265-iran-250-rials-2011-year-1390-feyziyeh-school?area=ee1d3dce776074f02893c352cc1937e29dee148f