I doubt that SS troops would be wearing M40 tunics at a 1938 rally as the name suggests the M40 was introduced in 1940,FritzLorenz wrote:http://atthefront.com/historical_refere ... unics.html
From the link: '' There are original photos of troops at the 1938 Party Rally wearing "M40's" and my originals are dated 38, 39 and 43 respectively.''
i would suspect these men in the 1938 pic to be wearing the 1937 VT tunic which was similar to the M40 except the lower
pocket flaps were slanted
To recap what i said above the M40 tunic features have pointed pocket flaps, 5 front buttons and pocket pleats if the tunic
does not have these features they are not the M40 style tunic regardless what your link says