Uberti Regulator available in 44/40 ,44 spcl & .45 Cal. (some were available with two Cylinders 44/40-44spcl & 45 -45 acp)
4 " & 4.75" bbl.
blued finish w/ color case hardened steel frame , available with polished brass trigger guard & back strap or steel plow handle one piece walnut grip.
Also steel back strap birds head ,one piece walnut grip. ( not to be confused with the Lighting/Thunders bird heads style )
There were also some in guns nickel finish....
My nephew has one of the bird heads & 4" barrel in 44/40.. quick handling right out of the box... nice shooter.
I don't know if the Regulator name is still used ... Taylor's & Cimarron use the Cattleman name and is essentially the same gun.
I believe E.M.F & Tristar, Midway and now perhaps Cabela's imported them under that name...