Ralph;
Yes, I would imagine they are worth saving. See folks at the swap meets with some of these old cans, both empty and full. They have a dear price on them.
Remember Veedol oil? See some of them for sale around here.
When I moved here, I probably had 2 truckloads of miscelleneous auction dollar box items. Many as yet unidentified. Have a peck fruit box full of rope seal removal and installation tools of all sizes. Have another half box of antique wrenches.
Funny how these items accumulate when you buy a box with 1 or 2 items you can use. Can't get rid of them, may be just what I need someday... Gene