Morrocan 1/2 dirham? [solved]

I have no success in the French Forum with the following coin, so I submit it to you.
This silver coin is 13 mm (diameter) (sorry, I have not the weight...) but very similar to 1/2 dirham.
I was thinking, when I bought it that it was a Sa'dian coin, but I did not find similar in my books or on the web.
There is no "date" as per Sa'dian; early Alawi are without date but not similar to this coin...
So I'am thinking that it is not a Morrocan coin, even if I bought it in Morocco?

Any idea?

Just to get things started, on the first picture, the middle and lower lines read: 'Abdullah Ahmad:

عبدالله
احمد

And on the reverse, on the middle line, "caliph"

خليفة

EDIT: And I think below, it says "year 7": (of his reign):

السنة ٧
.

There was one Wattasid: Abu 'l -"Abbas Ahmad"(AH 932-952) but Wattasid dirhams are square.
And 3 Sa'dian sharifs:
1) Abu el Abbas Ahmed I AH 923-951)
2) Abu 'l 'Abbas Ahmad II el Mansur (AH 986-1012)
3) Abu 'l Abbas Ahmad III (AH-1037-1038)
For 1) the mint is Sijilmasa, ther are only 4 1/4 dirhams (13 mm) in "Méreaux" book, but no reference in Brethes or Album., but may-be they are the nearest of mine.
For 2 ) Usually we can read "el Mansur" (Brethes 1432, 1434, 1435, 1439, 1441,..)
For 3) It was the end of Sa'dian , only one coin is known with the mention "al-soltan Ahmad"
Few minutes ago, on the French forum, Cycnos think tha t the first line could be "Badr-al"....

Do you know some others "Abdallah Ahmad" who are not from Morroco?

The last line of the first picture could also read "Ahmal" (احمل) but I don't think it's a name; it is a word but I've never seen it on coins.

The first line could be read as «...باصر» or «... بامر». The second possibility means "by order (of) ...", where ب = "with" or "by" and امر = "order".

I'll comment on the French forum as well.

Sa’dian Sharifs
Ruler: Abu’l-‘Abbas al-Mahdi, rebel in the region of Sijilmasa, circa 1020-1022 / 1611-1613
Half dirham
w/o mint
w/o date on coin, but phrasing matches dinar and half dinar with date of 1021 H / 1612 AD
reference: #247 in
Edit
The correct title of the thesis is: The Inscriptions on the movable monuments of Morocco during the reign of the Sa'dian sharfs 916-1069 A.H  1510-1659 AD : an archaeological comparative study (2010) by Naiera Rafik Galal

Obv.
با صرالدين
عبد الله
احمد
Margin reported as: لا يوجد

Rev.
المهدي
خليفة
الله

Margin reported as: احد وعشينو

Hi Numisquare,

You seem to have an exact ID for the coin. Were you able to obtain that thesis you mention?

The first word on the obverse seems to read با صر as I suggested, but the expression با صرالدين doesn't seem idiomatic at all.

The thesis, in Arabic, was a gift from the author. There is a copy at the American Numismatic Society library in New York.

This phrase (ناصر الدين) means ‘he who stands up for religion /Islam’, and is in line with the title and meaning of المهدي, al-Mahdi.

Thanks, Numisquare.

Perhaps someone who is also on Zeno should report this to Stephen Album. I'm quite sure he would appreciate it.