Hi Harry,
No I do not think so. What Steve refers to is a blade much like this ()...... curved surfaces but no ridge. I have not seen one either, so assume that they are not common. The two Rashaq Dharia you show have similar but not identical ribbed blades. Some also have fullered blades though they do not appear that often either, and are likely Saudi types. Don't forget that Steve's book is about Yemeni types.
Stu
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