Toyvo,

I think this is not a bendix-style wheel cylinder (Bendix style was used in 1954): http://s1070.photobucket.com/user/toyvo75/media/100_7234_zpsxymevod0.jpg.html

It looks like it has two adjusting/adjustment wheels/rings, like a huck-style wheel cylinder?

There might be casting codes on the rear end-housing - post what you find and someone might be able to decode it and determine the year.

Do the front wheel cylinders have one or two adjustment rings/wheels?
Figure 2. Huck style wheel cylinder...p through 1950) - two adjustment rings.
Figure 1. Bendix style wheel cylind...rom 1951 onwards - one adjustment rings.