Ok, I'll give it a go. It's just my opinion....The revolver is early 70's. It shows the marks and scars of honest work. It's a shooter with the box (a bonus). I assume the box serial number is the same as the gun. Now, the M15-3 did not come standard with a red ramp front site but could have been ordered with one from the factory. Your M15 has a red ramp front site and the box shows RR for red ramp front site but in a different color than the rest of the ink. So, I have a couple of thoughts before I say a price.
You mention it was your duty gun. To me that means Law Enforcement of some sort. Was your duty weapon ordered by your employer and shipped to them? If so, they could have requested the target trigger, target hammer, and red ramp from the factory. Combine the factory ordered options and the shipment to a LE agency and the price drives up as there are many collectors who chase duty guns. Now, if you bought the gun yourself at a gun store then had the armorer add the front red ramp site, its cool, but not near as cool as factory done.
If ordered from the factory and shipped to LE agency the gun would sell for $600-$900 around here, more with factory letter for provenance and more for a collector who really wants that particular LEA gun.
If it was a store bought gun, then tastefully had the site altered, it should easily see $500, give or take a hundred. Its a shooter after all.
The holster and leather duty belt stuff is not my forte but I believe you could add $50-100. The well used target stocks, maybe $25-$45. The pachmayrs maybe another $25.
If it was your duty weapon and all your duty gear, in my opinion, it should stay together.
Others may chime in with price estimates as well. Just giving you my opinion from what I see locally. If I saw this locally, I would try to acquire it.
Hank
