Help to Identify this tractor

[MikeWebster]

I need help to positively identify this tractor. I believe it is some Big Four model. The photo was taken in 1914. The shorter adult is probably my grandfather who worked at Rumely Products in Des Moines, Iowa as a engineer/mechanic. They manufactured large tractors too.

 

[CraigWis]

There are only a Hand full of the Big Four series tractors still around. I think it maybe the Big Four 45. A Big Four 30 is at the Frontier Museum in Monticallo Ut. The one in your Picture looks bigger. The 30 had a 99" tall rear wheel and the one pictured looks taller The 45 was made from 1913 to maybe 1916

 

[Deere Mark]

A few Big Four pictures taken in 2023 at Kinzers PA tractor/steam show.