The Buick Master Six was an automobile built by the Buick Motor Division of General Motors from 1925 to 1928. It was powered by a 255 cu in (4.2 L) Buick Straight-6 engine and available as either Sedan and Touring models. It was Buick's high-end offering, above the [B][U]Standard Six[/U][/B].
[SIZE="1"]Source: wikipedia.org[/SIZE]