We need some more information to answer your question- starting with the word "break". Many of the early hammerless revolvers were a "break action", when the revolver was loaded/ unloaded by lifting a latch at the top rear of the frame. This permitted the action to be pivoted open (or broken), and the fired cartridges ejected, and new cartridges inserted. If you mean "break" as in destroy, that is too broad to answwer here. Please feel free to leave a message on my message board, and we will try to get you a good answer.
Yes, in several variations.
5-80 uSD or so
1910
The Kolb Baby Hammerless revolver was made in several different variations. Value will depend on exact model, and condition. IF yours is in firing condition, it may be worth $200-$400. These did not have very durable springs- they break easily. They were the smallest double action revolver made.
They were designed as 'hammerless' so that they have less chance to catch or snag on clothing when being drawn from concealment.
10-100
I have a friend who has a 32 cal, break open hammerless revolver, chrome finished, in excellent shape. As near as the person who had it remembered, it was perchased around the early thirties. It is stamped American Revolver co. with ivory grips.
Turn of the century or thereabout.
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.
10-60 usd
10-100 usd
No published sn data. @ turn of the century