I picked this up in a trade a few days ago. It's a Mark II so that put's it in the 1895-1897 production range. I has not been converted so it is still chambered in the original .455 Webley caliber. Fiocchi ammo is still available for it for about $.70 per round. I has what looks like the original holster and is in pretty good shape other than missing the screw that holds the extractor in the frame. I'll see if Martin Retting has this part or arrange to fabricate a replacement. I shot it this past weekend and it feels like a lightly loaded .38. An interesting piece of history