I think you start with the premise that in this case the shutter and lens are original, if you were going to the trouble of replacing them then it's unlikely you'd go for a budget shutter and triplet lens again. Add to that the camera itself has no front rise/fall so we have a budget camera with the appropriate lens/shutter combination.

In a seperate thread Umut has listed the German camera manufacturers which includes those of of the 1920's/30's era, then you realise that identification can be an uphill task as almost every manufacturer made 9x12 cameras that are superficially quite similar. In the UK in the late 1900's you could assemble cameras from parts, they came in kit form from a couple of suppliers, German companies seem to have been buying in some components for these 9x12 cameras in much the same way.

Ian