Can't be answered without a DETAILED DESCRIPITON OF ALL MARKINGS and condition.
Harrington and Richardson made it.
Seldom exceed 75 USD
it was with you mom your mom made it here bad spot
There were dozens of different top break models made by Harrington & Richardson. Your best bet will be a search engine, such as Google. Select IMAGES, then Harrington & Richardson. The link below takes you to ONE such image- a nickel plated, top break 38 S&W hammerless revolver by H&R.
No, but it is rather old. The revolver Model .22 Special made by Harrington & Richardson, and the rather rare .22 Special cartridge were both made in the 1900's. To be classed as an Antique Firearm under US Law, it must use loose ball and powder (like a musket) or have been made in 1898 or earlier.
Harrington & Richardson did not make a Model 1900. Hopkins and Allen did.
H&R made utility firearms from 1874-1986. 50-100 USD
Your harrington and richardson model 900 was made between the years 1962-1973.
Sorry- not enough info to answer. The 7 shot revolvers were early guns- I have one made about 1900.
2013
1938 was the year
There is a company called Harrington and Richardson. They have made shotguns, rifles, revolvers, had military contracts for the M16 and various other weapons. They tend to be functional and basic, not high end.