You will have to call Kimber to find out.
The PY in the middle of your serial number dates your pistol to 1982.
What model?
Exactly how is the pistol marked? 9mm browning serial number 72C44338
what age serial # 917400
Impossible to answer without the serial number.
@ 1884
1977
about 1917
@1987.
1904
By the serial number and going to proofhouse.com
1916