Can you separate the two pieces, and send some pics of how they mate together? ....It may help ID a mower or snowblower attachment.
Did you find the B&S numbers? .....Is it a 6BH ?
I'm going to have to soak those Hand wheels with some kroil as they look like they are pretty rusted.
There is another ID tag on the tiller itself but I couldn't read it with the 2 halves together.