The Palestine Ensign, flown by ships registered in the British Mandate territory during the period 1927–1948.  This was the only Palestine-specific flag which was not restricted to official use by a government functionary or department (see Flag of the British Mandate for Palestine).
Design data from FOTW and the existing WP image (PNG by AnonMoos, now deleted). Created from scratch using PD resources.
User:Greentubing, User:AnonMoos