Clean, uncluttered, easy to decipher:

[Linked Image from i.postimg.cc]

[Linked Image from i.postimg.cc]

Which if I did this right, puts it 1954 to 1989:

[Linked Image from i.postimg.cc]

...I'm being told 1955 manufacture.

...but I get 1963 from this proof date:

[Linked Image from i.postimg.cc]