Changes

Originally raised from the [[Calcutta Port Defence Volunteers]] on the 1st April 1902 and then became the [[No. 1 Electrical Engineer Company]] on the 1st April 1917. On the 1st October 1920 the unit became [[No. 1 (Calcutta) Field Company]] before becoming No. 1 (Calcutta) Fortress Company on the 1st April 1933.