They used the enclosed clutch until the end of production and steel wheels were standard/rubber opt. Here are some pics of mine on a '37 A so you can see where the levers were on this one. Things can vary so won't be exactly what you need. As you can see it plows very nice and never varied depth or went too deep. This one does have the large dia land wheel.
Also , this one is 100% original (accept for rope).