Typically doing an online search for that model and browsing through the results will get you at least a birth date, if not their exact age.
The Fashion Spot can be useful for looking up the age on a model, as it usually has a back catalog of all their work where people often comment on a model's age.
You can find a lot over at Mod the Sims. You require a Pose Player to use them. You can also find the Pose Player at Mod the Sims
Need model number
The Sears Model 1 may be a Winchester mod 121. L0ok there
The way you find modulus of a number on a scientific calculator depends on the model of calculator. On the TI-86, you use mod (x,y) or x mod y to find modulus.
mod 97 ser 339974
I have a Glenfield Model 50 that i purchased new in 1969 or 1970,there about.
The Westernfield Mod 46A is a Mossberg Mod 42.
The Hercules Model 10 is actually a Stevens model 94. The model 94 was manufactured between 1926 and 1945.
your winchester model 1894 rifle was made by winchester in 1973.
The serial number is on the left side close to breachthe first two number on most mod 20 is the year of manufacture.
http://www.buzzillions.com/reviews/kids-trek-boys-mod-reviews#bz-model-wtb shows many of the stores that sell them for 189.00
your Winchester model 1894 was made in 1974.The first answer you received was totally incorrect.