Scottish Covenant Association
The Scottish Covenant Association was a non-partisan political organisation in Scotland in the 1940s and 1950s seeking to establish a devolved Scottish Assembly. It was formed by John MacCormick who had left the Scottish National Party in 1942 when they decided to support all-out independence for Scotland rather than devolution as had been their position.
Source: Wikipedia — Scottish Covenant Association (CC BY-SA 4.0)