Oliver 7 bottom pull plow

[Rolson]

I have a 7 bottom Oliver pull plow,it can be a 5,6 or 7 btm.It has the square beam across the top,and a 20 inch land wheel.I was wondering what number it might be? Guessing it is from the 60s.Thanks

 

[J. Schwiebert]

First guess would be a Model 450. First number will be a 4 as pull type plow model numbers started with a 4.