These very robust models  has the piston aimed in the oiler's body. The strength of lubrication pressure is manual. There is not utility tit is adapted for intermittent positive feed and for use whereever it is required to force grease some distance. It is all in brass and has no piece made of steel (spring, screw).
 It doesn't fear the navy athmosphere, then  Lunkenheimer named it   " MARINE " and     Powell    "COLONIAL"