There are a number of variants on the same theme.
In addition, the M1931 had a number of experimental variants.
The launch truck is available in a number of variants.
The island's name has been recorded in a number of variants.
It was produced in a number of variants during the war.
A number of variants were proposed but only the prototype was built.
A number of other variants were proposed that never entered production.
In between are any number of variants on these themes.
There are a number of variants, including two different stories.
No type has ever gone into production, although a number of experimental variants have been flown.
