What is "mattli"

Mattli (1907–1982), also sometimes Jo Mattli, was a Swiss-born and London-based fashion designer known for his couture designs and, later, his ready-to-wear clothing and couture patterns.

A member of the Incorporated Society of London Fashion Designers (IncSoc) – making him a key player in shaping London's post- war couture industry – he was characterised by British Vogue in March 1953 as a go-to designer women could trust: "Mattli's clothes have charming wearable qualities...One feels he cares more about dressing women than putting over fashion themes, good though his are."