# invert error

> postage stamp with upside-down printing

**Wikidata**: [Q1981896](https://www.wikidata.org/wiki/Q1981896)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Invert_error)  
**Source**: https://4ort.xyz/entity/invert-error


## References

1. Freebase Data Dumps. 2013