Steinway "S"?

[jennfee@ibm.net]

Thanks for the responses.
I must confess that I may have given some misleading information.
The piano in question is an upright, not a grand.
The owner rebuilt the reproducing mechanism, did a pretty good
regulating job, and had tuned it himself. As he also had several other
pianos on the go, I assumed thet he knew what he was talking about when
he said it was an "S".  I do know that the serial # puts the piano at
1920.
As for the condition - Tuning pins neither jumpy nor loose, no rust on
the strings(I assume it was restrung a few years back), coils were
perfect!, I spent some time seating strings at termination points, etc..
I've heard other technicians say that Steinway uprights are difficult to
tune. In light of this new info. as stated above, any new
insights/techniques for getting the strings and pins to stay where I
want them to would be greatly appreciated.
My apologies if I seem to be beating a dead horse.

Thanks again, 

Dale Davidson