I have two of these (http://i1297.photobucket.com/albums/ag37/Lowspeedlife/Mobile%20Uploads/2015-09/F287DBC5-358D-4838-B199-D7319CDC77F3_zps0ql6sgcy.jpg) (http://s1297.photobucket.com/user/Lowspeedlife/media/Mobile%20Uploads/2015-09/F287DBC5-358D-4838-B199-D7319CDC77F3_zps0ql6sgcy.jpg.html)
mounted to the drive housings on my '49 HG 68, I think they must have been to mount a plow of some kind. There is also a lever mounted to the right side that must have been to raise & lower the plow shares. If anyone knows for sure I'd be interested in finding out.
Scott
Cultivators?