Yes they would have been from the year 1899 as it has been a good 20 yrs. or more since I found them. Even then they had been there along time due to the condition of them being out in the elements so long. I looked at your links to the Jeffrey machine wheels. The ones I found are not spoked wheels but are solid wheels and very heavy! A week or so ago someone on Ebay had 2 large RR carts with flanged wheels for sale for $1,300 or $650 each, in Nebraska, they are still available. The Ebay item listing number is: 320741631041 both carts have spoked wheels that look identical or almost to the photos of the spoked wheels in the Jeffrey links you provided but in a close up picture of one of the wheel hubs it looks to say Timken Quality Equipment with a logo of a large W in the center with 2 T's and a A inside the large W.