The frame number can usually be found on the underside of the bottom bracket. With that you might be able to track down the year-if you find someone who can tell you how to decode the frame number.
2010
In the 1920s
Approximately 3 million bicycles are bought in the UK each year. Cycling has gained popularity as a mode of transport and for fitness, leading to an increase in bicycle sales.
If the bicycles belong to ONE FRIEND, it's "friend's bicycles." If the bicycles belong to TWO OR MORE FRIENDS, it's "friends' bicycles."
No, it's every twelve seconds.
1.8 bicycles.
There is no specific collective noun for bicycles, in which case a noun suitable for the situation is used, for example a rack of bicycles, a row of bicycles, a standof bicycles, etc.
what did the ancient bicycles look like?
Bicycles weren't invented in Canada.
More bicycles
The first bicycles were powered by humans.
KHS Bicycles was created in 1974.