Hello JP@AK, Thanks for your reply, no sir, no screw is located in front of trigger guard, pistol has a total of three screws. Forward screw on sight leaf is forward of cylinder gap. So this is what I got..... A box with the correct s/n that matches the gun but model number on box states that it is a 17-2. I have used my optical visor to look at the crane. I have had gun savvy Gentlemen to look at the pistol markings, it is clearly stamped 17-1.
With that description, clearly what you have is a Model 17-3. Both the end label on the box and the stamp in the yoke cut are incorrect. It happens. The serial number does line up with a Model 17-3.