Stamping on rallye wheels

Hi, can someone decode this. These stamps are on a 15 rally wheel. Thx Armin
[img:left]http://www.pic-upload.de/view-27785391/image.jpg.html[/img]

2 is Feb
13 is 13th day of month
M1 is Motor Wheel Plant 1

The number under the M1 is the year. Can't see it in your photo.

thx alot!