That Déanta i nÉirinn sign was designed by Alec Wilson and used universally. Incidentally, John O'Neill had moved his factory to Pleasants Street by 1916, when the manager, JJ Dunphy, gave shelter to at least one of the Jacob's garrison and was himself lifted - he was living next door to the factory… (attached, screenshot from the Sinn Féin Rebellion Handbook, which lists most of the hundreds arrested and interned, and Alec Wilson's design of the Déanta i nÉirinn sign).