Never.
There have been a number of "hammerless" revolvers made, ranging from the tiny Baby Hammerless .22, thru the Iver Johnson and US Revolver Hammerless topbreaks, and includinurrent day Smoth & Wesson revolvers. All DO have hammers that are internal to the handgun frame.
I can say that these revolvers were made from 1911-1935.I do not believe that the serial numbers are available in the public domain.The value of these revolvers is between 50-100 dollars,for a firearm having between 60%-90% of its original finish remaining,and a good bore.
A Colt 380 hammerless with that serial number was made in 1915.
the model 1908 hammerless 380 with serial # 60093 was made about 1923
The Colt 1908 hammerless .380 with that serial number was made in 1937.
That Colt .32 hammerless was made in 1924.
made about 1929
Howard Arms was a trade name used by Sears Roebuck on revolvers made by their subsidiary company, Meriden Firearms Co., from about 1905 to 1915. The only "model" designation would be the caliber, .38 or .32.
Yes, revolvers are still being made- including new calibers and new designs. Revolvers remain very popular for defense, target shooting, and hunting.
There are dozens of models of rifles and a few revolvers that fire the .17 HMR cartridge. Rifles in that caliber are made by Remington, Winchester, Marlin, Mossberg, Savage, Taurus and others.
Made in 1916.
I found a 1903 hammerless .32 with that serial number made in 1925.