Mack AC 'Bulldog' type EHC1

The Mack AC was developed in 1915 and introduced in 1916. It acquired its name from a combination of the radiator position being behind the engine and the sloping coal-scuttle shaped bonnet and a nickname bestowed upon it by the British who order 150 in 1917. The AC had a reputation for being durable and reliable. Production continued until 1939 with 40,299 being built of which the British used 2,000 of the 4,500 used during WWI.

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