Found the following article online, use it to answer the question: What county did the district with three tiers of government a part of before the 1974 amalgamation?

Brownhills is represented by three tiers of government, Walsall Borough Council ("local"), UK Parliament ("national"), and European Parliament ("Europe").
The Brownhills District established in 1877 remained in existence until 1894 when it was superseded by Brownhills Urban District. In 1966 the Urban District merged with that of Aldridge to form the Aldridge-Brownhills Urban District, in accordance with a recommendation of the Local Government Commission for England. This in turn was amalgamated in 1974, under the Local Government Act 1972, into the newly formed Metropolitan Borough of Walsall, under whose jurisdiction the area remains to this day. As a result of this amalgamation Brownhills also became part of the West Midlands county, having previously been part of Staffordshire. Today Brownhills constitutes a ward within the Borough of Walsall and has three seats on the Borough Council. As at the 2008 local elections two of these seats were held by the Conservative Party and one by Labour.Wendy Morton, representing the Conservative Party, has been the Member of Parliament for the constituency of Aldridge-Brownhills since 2015. Before the creation of the Aldridge-Brownhills seat in 1974, the town had been part of the Walsall North constituency since 1955, when it had been transferred from the now-defunct Cannock constituency.Brownhills is part of the Walsall council counting area of the West Midlands European Parliament constituency, which elects six MEPs. In the 2009 election the Conservatives gained 26.8% of the vote in this counting area, ahead of UKIP 24.5% and Labour with 18.9%.

Staffordshire