Vintage 70s Swedish Military Jacket C150

Vintage 70s green canvas Swedish military / army jacket. Fantastic metal button with raised crown detail and a nice tapered fit. Interior stamped 66 (size?) and C-150 (model?). Sleeves have the option for lengthening. Does have a small imperfection on shoulder, see photos for details. Measures 18" across shoulders, 22" pit to pit, 23.5" sleeve, 32" long.