Variants and attestation
Raetic Mu appears consistently with three rather than four bars (, as prevalent in Etruscan, Venetic and Lepontic). This characteristic, unifying the Sanzeno and Magrè alphabets, connects the Raetic script with the Venetic alphabet of Vicenza (see Script), though three-barred Mu also appears in the Lugano corpus (see Lexicon Leponticum: M). Mu is never attested in inverted form, but the inverted variant is retained as a possibility to parallel (rare) inverted Nu.
|Lexicon Leponticum||David Stifter, Martin Braun, Michela Vignoli et al., Lexicon Leponticum. URL: http://www.univie.ac.at/lexlep/|