does it have a delete cover on the back end where the pto would have been?
does it have a standard top cover with upper lift arms, or a delete plate.. or a top cover and no lift arms and no rockshaft.. or does it have a rockshaft.
lastly, is the belly pump present.. or is it simply a delete cover on the bottom of the center section.
if it is missing the pto shaft.. it likely has no hyd pump.. if no pump.. it may have been an industrial or other machine.. and to add the top cover, pump and pto shaft may be cheaper to buy the back end of a junked 9n that has the stuff.. then swap parts.. or entire rear...