Brass oilers

Here is my collection of oilers from gas engines and ,machines . There are also some grease cups ,and sight glasses ,these were all given to me or found around our farm ,The ones that were given to me are from a longtime friend of ours who was cleaning out his grandfathers workshop and was going to throw them away if I didn't want them.I polished all of them and mounted them on wood to display.The center one I'm told is for a steam engine!