Jackyl:
Gun number 1 is a K frame Chiefs Special or Chiefs Special Airweight. It falls in the period 1962 to 1969, (serial number range 29500 to 786544). The flat latch was deleted in 1966, because of the low serial number I think it is safe to assume your gun dates from 1962, 1963 at the latest.
Gun number 2 is interesting. It's not a Model 17/ K22 Target Masterpiece, as the serial number doesn't include a K. It's not a model 34 Kit Gun as serial numbers only went to 135465. Potentially it is a prewar .22/32 Hand Ejector which may have some collectors value. These were introduced in 1911 at serial number 138226. In 1915 the serial numbers were in the 160000 range and serial number 525600 is recorded in 1935, which gives a 20 year spread. Try posting a pic and we'll see if we can verify the identification.
Gun number 3, I need more info for. What caliber? Hammerless or exposed hammer? Does it have S&W marking?
Gun number 4: Forehand Arms was the successor company to Forehand & Wadsworth, manufacturing from 1890 to 1902 when they were taken over by Hopkins & Allen. Some of the Forehand Arms/ Forehand & Wadsworth guns were quite good and command reasonable money. Others were suicide specials.