4V50
The revolver below the Ruger is a pristine 1915 Colt New Service 45 Colt that has a reduced cylinder to accept .45 ACP (this is a factory original feature). A nice man at Colt told me that the extention is a factory compensator, although it has no ports....etc...only an odd cross style groove pattern that is cut very deep apparantly to stabilize the bullet or some such.
Not real sure, I am still researching this revolver, since I acquired it a week or so ago, anyway this is the info I have amassed so far. By the way it is an extraordinary example of old Colt craftsmanship. I am not sure if I can bring myself to fire it. Especially considering its current condition and value. Is nice to look at though.
Oh and the oriental carpet is the comforter on my bed.......of course my wife has all the fixins.....ie: dust ruffle, drapes, pillow shams ad nauseum.