The above image is a photograph of the flag still in the possession of the National Museum. Their notes about this artefact are as follows;
The Plough and the Stars: The Irish Citizen Army flag in 1916 as flown over the Imperial Hotel during the Rising. 6' x 5' 5". Green Field with gilt fringe. On the field a yellow plough outlined in black and seven silver stars also outlined in black. Patches missing over the right hand shaft of the plough and beneath it. Another patch is missing in the field to left. The coulter of the plough is represented as a sword with a jagged or worn blade. The flag has many holes in it that may be bullet holes.
Stated by Sean O'Casey to have been made by the Dun Emer Guild
(Hayes McCoy - History of Irish Flags). HE:EW.2362
The following contains some extracts from the letter.