Is anyone familiar with this brand of revolver?

I have a good collection of Colt and S-W revolvers and I recently acquired this piece.

I don't know much about it other than it appears to be a model 15, 6" barrel, .357 caliber, made in Monson, Mass and it appears to be in great mechanical shape. A few usual wear marks (blueing worn down at the end of the barrel from somebody playing "quickdraw", small scratches from a trigger lock, etc.) but the gun is TIGHT!

I was drawn to the piece because of it's changeable barrel. Guys and gadgetry, you know how we are!

I guess these were/are the hot set-up for long distance target shoots.

So anyway, does anyone own one or has experience with them?