The hammer looks very similar to the standard SBH hammer - perhaps an easy 'change' to go to that checkering. I have three 4.6" SS BHG (Black Micarta.) revolvers. I fitted the Bisley hammer to my 4.6" SS BHG .45 - and the .22 Bisley's hammer to my .32 BHG. My .44 version is a SBH with a QPR BHG frame/grip fitted. The SBH hammer is a drop-in - no fitting required for a Vaq or BH. Of course, the 3.75" Vaquero was around for some time with the BHG. They did have a problem in reloading - the shortened ejector wouldn't fully toss the empties. Additionally, the required flush-headed base pin seemed to be less tolerant of recoil, often coming loose - or, as I experienced with another range-user's revolver, they can actually eject the base pin. Also, I have to wonder why they neglected to include their newbie's weight in that data.
I won't be getting in line for one. I guess the smaller grip frame design barely permits the lock to be equipped, and the shortened BH style - and the BHG - just wouldn't permit it's future inclusion, thus their MIA status in the catalogs. Now, if they'd go to the tighter, ie, non-black powder spec, chamber ID, that'd get my attention. Of course, it would probably not be popular in a CAS gun, as it'd require more frequent cleaning - and some of their competition can be involved.
Stainz