Paul,

Thanks for your question. I date this sign to the 1920's due to the fact atht I bought it from the son of the owner of the Implement Dealer in Helena. He had records showing when his dad sold JD equipment, and the evetually this company went out of buisness and the man's father took over the store and focused on saddles and tack. I'm not a JD expert either, but those who I have spoke to agreed with the age of the sign. If anyone has other information I would love to know more! Thanks again!

Dustin-