David leaves his tent with his Revolver in its holster and attached by a lanyard to his shoulder. Mabrouka then runs to warn him of the German patrol by which time he no longer has his revolver as it needs to be found under a pillow by a German Officer.
Donald Pleasance is sat on a camel while talking to Anthony Bushell about payment. In a side shot he's holding his jacket lapels but in a shot from the back his right hand is on the back pommel of his saddle.
The road where the ambush takes place is clearly a post-war build, having asphalt and neat chicane.
Sabratha, the Roman ruins are by the sea, whereas it is established that the Bedouin camp is in the desert.