Staffordshire Blue Transferware Coaster, Stagecoach?

This is a nice vintage blue Staffordshire transferware coaster (sometimes also sold as a butter plate). It is about 4.5 inches in diameter. It was made in England, and we think it was part of the English Ironstone Tableware company's Stage Coach series, but we are not 100% sure. It has some stray blue marks, typical of this type of blue transferware. It was used, but has hardly any evidence of wear, and has no cracks, chips, crazing, or repairs.