No way to tell without some information. You have given us the make, and part of the caliber.
Dieter Marschall's book might have what you need.
p
The "P" is police Mode What you get is your Speed in Digital on the display
look on top of receiver, just behind barrel and you will see manufactured date
ice :P
20-100
50-400 depending on specifics
The best route is to ask a gunsmith for assistance.
look on top of receiver, just behind the barrel. That is the year made...........
The letter on a penny refers to the mint at which it was manufactured. P is Philadelphia, D is Denver.
Rd= Vt*c/I Vt=KT/q, K=Boltzmann constant C= constant 2 for si 1 for Ge I current through the diode
some cars and stuff :P