Hello, Yes i was a little vague on the wheel I.D. as a give away. The TK pictured is yes on rubber as you can see and did come out that way but a little hard to date them as rubber was hard to get during WW2 This one could be a post or pre war plow TK model. Mine is on steel and has a tongue and axle housing tubes "round just like this one as well.
Pardon the pun but they are a trip at plowing shows and fun I got a story on one show.LOL