After giving it the once over I found one of the steel rivets that held the Data tag, the other rivet has apparently rusted flush with the deck. It looks like it was mounted beside the gearbox and could have been read by standing to the left of the bush hog and facing the gearbox.
r4 is the model number or something. I think it has to do with how heavy duty it is? My tag on my razorback it located on the truss support where the gearbox is mounted and it faces up. so not really the deck but that reinforced area of the deck I guess on the left hand side looking forward next to gear box.
I think the Razorback is the standard duty and the squealer is more of a medium duty unit. The Squealer units have had a round back for about ten years so you have an older design. I don't know about this case, but sometimes older is better.
We've got a 5' Squeeler just like it...
I've got to replace the front seal in the gearbox...
Little unit has run fine but it is not heavy duty...
I've beat the snot out of it...
The sides are gonna need reinforcement welded due to my abuse...
Don't use is much since I bought the Brown...