I have a 1917 Chickering parlor grand piano. I've always had it 
tuned to A435, thinking that a piano from that period was designed 
for that pitch. 

My question is, does it really matter? If I have tuned it to A440, 
will it be safe and will it sound "better"?

Kermit Hobbs 

 [ Orchestras still cannot agree upon what the Standard Pitch should
 [ be; see https://capionlarsen.com/history-pitch/ -- Robbie