Hello. I recently purchased an S&W M686 3" bbl. .357 revolver that is reportedly made for the Customs Service in 1988. These are marked on the frame beneath the yoke with "CS-1". Supposedly, a total of 3281 such revolvers were made before they went to 4" guns. They have a round butt rather than the usual square; at least this one does.
The gun was not new and had Pachmayr grips on it. I replaced them with these Eagle Secret Service Grips. The gun was almost like NIB. I'd estimate very few rounds having been fired through it. The front sight is narrower than the usual 1/8". It appears to be about 1/10".
I would appreciate any information on this model or personal experiences that members might have.
Thank you in advance.