These developed into the 50550 class of 1941-42, with various modifications.

This was built in the late 17th century with later modifications.

Some have been produced with little modification from the late 16th or early 17th century.

This plane with modifications and all, I'd guess close to four million.

Number 2 is also to be accepted only with some modifications.

A second course began in 2008, with some modifications, and is scheduled to continue until 2013.

With very little modification these regulations are still in force today.

This system, with minor modifications, may still be used today.

Class 1 is made of stock vehicles, with few or no modifications.

Both events are being planned for this year, with some modifications.