# Boeing Model 40

> 1925 mailplane family by Boeing

**Wikidata**: [Q890192](https://www.wikidata.org/wiki/Q890192)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Boeing_Model_40)  
**Source**: https://4ort.xyz/entity/boeing-model-40


## References

1. Passenger Airliners of the United States 1926-1986
2. Freebase Data Dumps. 2013
3. The Complete Encyclopedia of Flight 1848-1939, Chartwell Edition