Velostigmat f/4.5 with no series marking?

[Mattk]

I found a junk betas shutter with velostimat cells. The lens is marked Velostigmat f/4.5 but have no series markings. I know there were some enlarging velostigmats, but I thought they were marked as such. Did any of the early series II lenses omit the series markings? It a 9 1/2”. I have several longer focal length velostimats and they are all marked.

[Whir-Click]

Wollensak appears to have dropped the Velostigmat “Series II” engraving shortly before the name change to Raptar in 1947. Check the back of the Betax shutter to see if there is an inspection date scratched or lightly penciled.