Armstrong Whitworth Aircraft Ltd
Avro Type 683 – Lancaster B I. Serial Numbers NF906-NF939, NF952-NF999, NG113-NG149, NG162-NG206, NG218-NG259, NG263-NG308, NG321-NG367, NG379-NG421, NG434-NG469 and NG482-NG503
The fourth production batch of 400 aircraft ordered from Armstrong Whitworth Aircraft Ltd, as the fourth part of Contract # 239/SAS/C4.
Deliveries commenced July 1944 and completed February 1945
Most aircraft initially installed with Merlin 24 engines.
