Stubai history shows that the Stubai marks on products started in 1960, but I believe the marks started in 1959. I was able to find some proof of that where on the Vertical Archaeology website, Ashby shows the “Good Companions” catalogue offered by Thomas Black & Sons from 1959, which has a product "Ice Pitons" showing in it listed as Stubai. The F.Ralling Hammerwerk Fulpmes pitons became the Stubai pitons starting sometime 1959/1960.
This Good Companions catalog shows perfectly the confusion that collectors face today as they work to make sense of the Made in Austria products. This one page alone shows four different items which seem to come from four different manufacturers which in true