IIRC, the only three Ruger SA revolvers made with an unfluted cylinder were the BearCat (roll-engraved), the Single-Six (extra cylinder), and the Bisley Models (both RF & CF models).
Shot a ruger vaquero 357 because it was the closest they had to the blackhawk i learned with. Gotta say I was disappointed. It was stainless and the hammer was slippery and it just didnt feel right in my hand overall. ...guess I miss that old blackhawk!