Perfect so its hard to narrow then anything else because of it just saying constabulary, meaning it was just used generally in Ireland I assumeGood find. Yes' it's a British 'Constabulary' button, so police not military (quasi-mlitary if you will). The design is generic rather than for specific use in Ireland, and it's Victorian, with the crown style used up until 1901.
Perfect so its hard to narrow then anything else because of it just saying constabulary, meaning it was just used generally in Ireland I assume