Yemen - 2 Rials 1969 Moon Landing of Apollo XI

Coat of arms of the Yemen Arab Republic, the nominal worth, date and the countries name in arabic and western style.
Obverse Lettering:
الجمهورية العربية اليمنية
٢ ريالان
2R
1969-١٩٦٩
YEMEN ARAB REPUBLIC
Reverse: Depiction of the moon landing of Apollo II Lettering: APOLLO 11 20 JULY 1969
Numista makes a thing about these concerning the number of stars ( 6 or 7) but anotherl difference is the style of the engraving, thinner letters. rim dots, etc.. The 6 or 7 Star varieties are not described in KM. This example has 6 but I have seen 7 star types.