Àkọlé: Mark IV ni a ṣe nipasẹ awọn aṣelọpọ mẹfa: Metropolitan (olupilẹṣẹ ti o pọju), Fosters of Lincoln, Armstrong-Whitworth, Coventry Ordnance Works, William Beardmore ati Ile-iṣẹ ati Mirrlees, Watson & Co., pẹlu iṣelọpọ akọkọ ni ọdun 1917. A ṣe aṣẹ akọkọ fun awọn tanki 1,000 pẹlu Metropolitan ni Oṣu Kẹjọ ọdun 1916. Lẹhinna o fagile, tun ṣe atunṣe ati lẹhinna tun ṣe atunṣe laarin Oṣu Kẹjọ ati Oṣu kejila ọdun 1916. Awọn aṣelọpọ miiran, ti o ṣe adehun fun ko ju awọn tanki 100 lọ kọọkan, ko ni ipa si rogbodiyan laarin Stern ati Ile-iṣẹ Ogun. Ibeere: Awọn aṣelọpọ oriṣiriṣi melo ni o ṣe Mark IV?
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