Stief pianos were built in my hometown back in Baltimore , Md.
Downtown Howard Street I believe was there exact location.
I would say that at the time they were among the top 5 piano manufacturers. Steinway pianos were more popular but not better built.
The broken Action piece and key are fixable for under $100, the greater concern would be the age of the instrument and whether or not it can actually hold a tune. Since the pinblock is older it may not be able to hold the strings at proper tension. Hard to say without seeing the piano.
Hope this helps.