I had seen one something like that orange one mounted on an old automobile firewall
with an oil can in it. it was freshly painted gloss black.
some of the old timers carried the old squirt can oilers with their autos.
you had to oil the generators now and then, they had oil caps front & rear.
also oiled the leaf springs after they got wet and then dried out, (squeek, squeek.)
the old external valve lifters also needed oiling.