The position search engine gives you two different opportunities to search for position-characteristics:

1. Quick Search: Select the area of the stamp, which shows the most significant variety, then click to see the search results..
The result page will come up with the thumbnail-images of all types which show this category of  error. You can now scroll down and when you find a possible match, click on the image to zoom in and check the details.

2. Advanced Search: Type the shortcuts for the variety-classes shown on your stamp into the textbox. Separate them only with a space like that:

 ll co nw

This example search will show all types which show a broken left outline(ll), an error in CORREOS (co) and a distinctive feature in the top left (north-west) rosetta (nw). Best matching results on top of the page.

You can also type in position numbers. Try 118 125 126 156 170 !

The second search field lets you search the additional stamp description if available.

XXL Mode: When you have a highspeed connection to the internet you can switch to the XXL Mode. The search results are then not shown as thumbnails first, but directly as high-resolution images.