The image was done by Pat Holbrooke in 1944. There are many sources of the poster online looking to sell it to you.
It reads:
My Machine . . .
This is my machine. Mine!
There are other machines but this one is mine.
It is a part of me – I am a part of it.
We are one.
Together we are forging the weapons of Victory –
Weapons that will strike the shackles from men who would be free-
As I am free!
With thy help, O Lord, I will bring forth the most and the best
That is possible from my machine.
It multiples the power of my hands – when my hands are on the job.
It does true work – when my brain is alert to control it.
It does not falter – unless I falter.
It does not stop – unless I forget.
In the lands of my enemies, slaves, under the whip,
Labor at machines.
But I am free!
I abide by my machine of my own free will.
No man is my master – no man my slave.
And this way is best.
It is!
By unfaltering example we shall prove it is best –
My machine and I.
By argosies of ships and tanks and planes,
In the only language the enemy understands,
We shall prove it.
This is our pledge – mine and my machine’s –
Till Freedom’s light comes on again.