Don't know a lot about the Huffman can other than they came in various sizes. Could be used for either bulk oil dispensing from a drum or by inserting a quart can. Depending on the model.
There is a one gallon version also. That type of spout was patented and called "Swingspout".
The bottom one also came in various sizes for dispensing oil in bulk.
You can still buy cans like these today new. The style hasn't changed much.
I paid about $10.00 for each of my Huffman and swingspout cans, and wouldn't pay more than about $3.00 for the bottom one, they are very common.
Like quart cans, age can be somewhat determined by design. Really old versions used lead solder.
I have a large collection of these, I need to take photos of them and post.
Chuck