100-600 USD
50-400 usd
about 1947
Depends on the condition, upgrades and your location, it could go from 750 to 900.
probably some time after it was made. the military model was not nickel plated.
Around 1925 about 1925
100 or so
yes
There is no such thing as a model 17. model 12 and 15's were plated on occasion.
225 USD
Requires professional appraisal.
25-145 usd
Depending on condition, $275-$375.