The carburator

Here are some pics of the carbs.  Written on the carb body is 3D2135

The carb body is by Dell'orto and I think made in 2005.  On this side its marked as P1051, there are also bits of the carb marked sparco.

Top view of the carbs I think

The bottom view of the carb, showing the manufacture date.

There is a number on the slide is 07 so what does mean.  The tab shows dell'orto, does that mean that the carb is dell'orto or spaco.