This one is a Remington Model 1901 Target Pistol chambered in .22LR, and was customized with a special grip frame built to make the grips larger for some shooter. The gun has custom grips and forearm, and is stamped "A HUBALEK" on the barrel by the maker, Arthur Hubalek. Hubalek was a watch maker turned custom gunsmith in New York City in the late 1800's-early 1900's, and was a protégé of Harry Pope. Pope taught Hubalek how to build and rifle barrels, and Habalek specialized in .22 match barrels, plus custom offhand rifles. But when Hubalek struck out on his own Pope was unhappy with him, and considered him a traitor. He broke off all contact with Hubalek, and the two never spoke again.
The Model 1901 Target pistols were only built in two cartridges; .22LR and .44 Russian. They were an improved version of the Model 1891 pistols, and only 734 of these guns were made before production halted. Jerry Lankstron covered these in his book on Rolling Block pistols, and said they were the last and finest of the Rolling Block pistols. Some of these .22 pistols actually saw Olympic competition.
It should be in my hands by week's end, and then I'll have some more info once I can see it and disassemble it to see what Hubalek changed on it.
