With the single pre-1938 board, my concern is that the inner row of the braiding runs in the same direction as the outer rows.
Any opinions would be appreciated
For what it's worth, I can tell you that no change of shoulder boards for the black service dress occurred in 1938: The narrow, Allgemeine-SS-pattern boards continued to be worn with the black uniform until the end of the war.
Also, I think that the black underlay on the military-style Brigadeführer boards is odd:
If I recall correctly, the military-style shoulder boards worn by SSVT officers with their grey uniforms initially had white underlay for a brief period of time until Waffenfarbe was introduced. After that, officers below general officer rank had double underlay in branch color over black, while the underlay for SSVT/W-SS general officers' boards was light grey and that for SD/Sipo generals was toxic green.
I will leave more knowledgable members to comment on authenticity.
Much appreciated, I still have much to learn
Although maybe with the SS-Vt grey underlay for their Earth Grey or Field Grey Tunics, These are for the Black Service Tunic.
I think Jenkins has a narrow senior leader shoulder board on his site, if memory serves.
Such shoulder boards were worn on the grey uniform, as well, if such a person had only Allgemeine SS rank.
The military style shoulder boards with the black facing color are fantasy pieces.
See the image of Oberfuehrer Wimmer here: on p.17
Uniforms of the SS Vol. I
This link to the Mollo book should be made into a sticky, in fact. I do not know if that is copyright infringement, but it is the essential source.
Thanks for the link to these great works.