I bought a pen.
I bought Lamy Pico, a small, pocketable ballpoint pen.
I owned Lamy Pico and always kept it in my pocket
and used it everyday and everywhere.
But I lost it as a result of my carelessness.
Then, many years have passed.
I again bought it and I hope I don't lose it.
How many years can I use my new Lamy Pico?
It depends on my carefulness, of course.