G'day
mowers,
The actual width of cut is measured across the reel, rather than the frame.
So it's now apparent that you have a 30" Queen Model 16, which we here at ODK have only recently confirmed as having been produced, as described
HERE.
bonnar_bloke has summed up the intended use of this model very well; it's designed to handle big area mowing, and isn't sufficiently manoeuvrable for a domestic lawn.