Single shot break action? yes.
30 billion
100-600 or so
1971
depends on the specs. of each weapon
dirty harry's gun is a 44magnum
50-525 USD or so
50-550 usd
Can't be answered without the maker's name
Can't be answered with any accuracy without the serial number.
Impossible to answer without the serial number. You can, however, call Ruger or visit their webiste and find out.
difference between as on and as at