2020UNE-EN ISO 13385-1:2019 Geometrical product specifications (GPS) - Dimensional measuring equipment - Part 1: Design and metrological characteristics of callipers (ISO 13385-1:2019) (Endorsed by Asociación Española de Normalización in May of 2020.)
2012UNE-EN ISO 13385-1:2012 Geometrical product specifications (GPS) - Dimensional measuring equipment - Part 1: Callipers; Design and metrological characteristics (ISO 13385-1:2011)