I do not know who made it but I would like to remark that it appears to me that it reads "Made in Western-Germany", not "made in West Germany" and that may be an important difference. Following the founding of both the West (FRG) and East (GDR) German states in 1949, "Germany" was used by both sides at first. Following a collision of interests, the two parts developed different versions of markings over time until 1989. Note that they all were not used during given periods, some companies even ignored these changes; e.g. East German companies marking 'Germany' (instead of GDR, etc.) is quite common until 1972. Anyway, the list here is only to be seen as a general 'transformation rule of thumb' and the following versions can be found with or without preceeding "Made in".
FRG: "Germany -> Western-Germany -> West Germany -> W.Germany"
GDR: "Germany -> Eastern Germany -> East Germany -> German Democratic Republic -> GDR"
Now as your set shows "Western" instead of "West" it's an older version and so I would guess roughly between 1952 and 1956, depending on factory.