1950-1955.
your Stevens model87 was made between 1938-1945 with 200,000 rifles being made.
The Savage model 444B over under shotgun was made from 1969-1972.
1972 to 1989
Your serial number indicates that your Savage model 99 dates from the year 1951.
This model was made by Savage between 1930 and 1949. Dates by Serial are unknown
Model 24 .22/410 dates to around 1954. The Model 24 came in many "combo" gauges over the years. I own a Savage 24 .22/410 that was purchased new in 1955. Hope this helps.
The Marlin model 25 series of rifles were first made in the years 1987-1988.Your model 25N is one of these.
The Green Hornet - 1966 The Hornet and the Firefly 1-26 was released on: USA: 24 March 1967
Hornet's Nest - 1919 was released on: USA: July 1919
The Green Hornet - 1966 Hornet Save Thyself 1-23 was released on: USA: 3 March 1967
A Hornet's Nest - 1913 was released on: USA: 27 October 1913
The Marlin Glenfield model 60 is one of the rifles many variations that was in production from 1966-1982.