sentences:  When, in 1786, the Convention decided to obtain a seal for its own use, it refused to recognise the Lyon's jurisdiction over the matter and the seal was not obtained until 1821.No arms were registered by the Convention for the remainder of its existence until its dissolution in 1975.The traditional arms were used by Edinburgh Town Council until the reorganisation of local government in Scotland in May 1975, when it was succeeded by the City of Edinburgh District Council and a new coat of arms, based on the earlier one, was granted.