Three tangent double linear circles in Arabic. Accession date. `2` at the bottom is probably indicating the equivalence to 2 British Sovereigns
Obverse script
Arabic
Obverse lettering
الله
نصره
١٣٦٧
أحمد حميد الدين
امير المؤمنين الناصر لدين الله رب العالمين
٢ (Translation: Allah (God) helped him 1367 Ahmad Hamid ed-Din Commander of the Faithful, he who supports God`s religion, the Lord of the Universe 2)
Reverse description
Shahada encircled. In outer margin: denomination, date, and mint name read inward
Reverse script
Arabic
Reverse lettering
ضرب صنعا ★ المملكة المتوكليّة
اليَمنيَّة ★ نصف احمدى
الله
لا اله الا
محمد رسول
الله
سنه ٧٥ (Translation: Struck in Sana`a - Mutawakkilite Kingdom of Yemen - Half Ahmadi There`s no God but Allah Muhammad is the messenger of Allah Year 75)