If you look closely, you can see this has what's called a halftone effect......
Here's one of several ways to accomplish the effect.
Open your image
Duplicate (Ctrl + J) your image two times.
Select the 2nd layer from the top and set the blending mode to Overlay.
Select the top layer and Go to Filter > Sketch > Halftone Pattern. Adjust the setting to taste. Set the blending mode to Color Burn. Lower the layers opacity if needed.
Duplicate (Ctrl + J) the top layer you just altered and set the blending mode to Soft Light. Lower the layers opacity if needed.
(I did not cut this guy from the background as was done in the original)
There are also some color changes you can make so it will appear more vintage.