I'm having huge trouble dating some Delhi coins. I hopefully ID-ed them correctly - please share if my identification seems wrong in any way.
Here we go:
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1. Jalal al-din Firuz (1290-1296), Copper paika
A:

B:

Found it here: http://coinindia.com/galleries-khalji.html
Now where is the date ? I see a "19" on side A, but that doesn't help much ...
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2. Sikandar Shah Lodi (1488-1517) Silver tanka, AH 918
A:

B:

Found it here: http://coinindia.com/galleries-lodi.html
Also on numista: https://en.numista.com/catalogue/pieces38507.html
I am assuming it's "918" on side A. Is this correct of it the first number too far off strike to tell ?
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3. Firuz shah Tughluq - Tanka
A:

B:

From here: https://www.forumancientcoins.com/india/sultanates/del_cat3.html
I see 775 on side A. Is this good ? Well just when i thought the date was obvious, numista says there are none with that date.
https://en.numista.com/catalogue/pieces37964.html
Is the date missing from the numista list ?
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4. 'Ala' al-din Muhammad Khalji (1296-1316) Billon 2-gani
A:

B:

From here: http://coinindia.com/galleries-khalji.html and here http://www.identificacion-numismatica.com/t57268-india-sultanato-de-dehli-ala-al-din-muhammad-khalji-1296-1316-billon-2-gani
Also on numista: https://en.numista.com/catalogue/pieces38433.html
I have no idea about this one. Help :(
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5. Ghyath al-Din Balban - Jital
A:

B:

From here: https://oldindiacoins.wordpress.com/2012/02/08/delhi-sultanate-coins-balban-era/
And also numista: https://en.numista.com/catalogue/pieces38885.html
Numista lists this as no date. Is this true ?
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Thank you for your time