Egypt 1938 different coin types

Does anyone know why Egypt had two different coins of the same value at the same time?

https://en.numista.com/catalogue/pieces4823.html
https://en.numista.com/catalogue/pieces5961.html

Not sure but I have both of them.  Perhaps it's a commemorative coin and normal issue.

There is one very slight difference in the letter on the obverse   و the other   ؤ  as I can't read Arabic I don't know how much of a difference it is between the two letters (symbols)

Απόσπασμα: eminemDoes anyone know why Egypt had two different coins of the same value at the same time?

https://en.numista.com/catalogue/pieces4823.html
https://en.numista.com/catalogue/pieces5961.html

It's not particularly strange. When a government e.g. wanted to change from a more expensive metal in its coin production to a cheaper one, it had both coins circulating for a few years at the same time. Note that in 1943 only cheaper copper coin was issued.
Btw, the same was true for the 10 Milliemes coins
https://en.numista.com/catalogue/pieces7132.html
https://en.numista.com/catalogue/pieces4825.html

More often this happened with silver and copper coins. Russia is a good example here. When these copper 1 kopek coins were introduced during the Peter I monetary reform
https://en.numista.com/catalogue/pieces26898.html
tiny silver 'wire' kopeks like these
http://avscoins.com/en/coin/9777/russia-kopek-1700/
http://avscoins.com/en/coin/9778/russia-kopek-1702/
still circulated for about 15 years simultaneously, since the population knew and trusted silver kopecks more than the new copper coinage.
Another example: silver and copper 5 kopeks at the same time
https://en.numista.com/catalogue/pieces26893.html
https://en.numista.com/catalogue/pieces21241.html