Rare Old Bull Head Transmission Oil Can

I just purchased this neat old metal Bull Head can over the weekend we were on way home from a 4th of July outing and had to brake for a yard sale lol..I have tried to do some research regarding it but haven't really found anything about it yet. It wasn't actually included in the yard sale I was fixing to leave and saw it sitting under a bench beside the house and asked if it was for sale. The lady I purchased it from was 68 years old and said it was in her grandpa's barn when he passed away and when they sold the property she got it thinking that she would do something with it but never had and a few weeks ago a storm blew down her storage shed and when they cleaned up the mess her son was going to throw it away and she told him not to and he sit it where it was. To which I said oh then its not for sale she said honey if you want it give me $2.00 and I was so doing my happy dance lol..If anyone knows anything regarding the age or etc of it please share it with me I would love to know more about it for now it is sitting on my front porch but I plan on using it as display in one of my flowerbeds..