From Stamps of the World
Altrincham is a market town in Trafford, Greater Manchester, England, south of the River Mersey about 8 miles (13 km) southwest of Manchester city centre, 3 miles (5 km) south-southwest of Sale and 10 miles (16 km) east of Warrington.
Historically part of Cheshire, Altrincham was established as a market town in 1290, a time when the economy of most communities was based on agriculture rather than trade, and there is still a market in the town today. Further socioeconomic development came with the extension of the Bridgewater Canal to Altrincham in 1765 and the arrival of the railway in 1849, stimulating industrial activity in the town. Outlying villages were absorbed by Altrincham's subsequent growth, along with the grounds of Dunham Massey Hall, formerly the home of the Earl of Stamford, and now a tourist attraction with three Grade I Listed Buildings and a deer park.
Altrincham today is an affluent commuter town, partly because of its transport links. The town has a strong middle class presence; there has been a steady increase in Altrincham's middle classes since the 19th century. It is also home to Altrincham F.C. and three ice hockey clubs, Manchester Storm, Altrincham Aces and Trafford Tornados. Altrincham's population increased to 45,809 in 2011.
Altrincham was allocated the numeral 12 in the post office lists of 1844.