Merwin Hulbert single action, early first model with scalloped cylinder flutes, #1970 with hump back hammer, about 98% nice shiny nickel, scarce red & black grips, see Phelps book, you will look a long time before finding a better one in this configuration, been in my M & H collection for 20 years, $12,500.
I guarantee my items 100% original unless otherwise noted 210-490-2433