Traditional Fleischsalat is made with Ring Bologna, 
German Pickles and preferably German Mayonnaise. 
Here the recipe for the Fleischsalat shown in the picture:

3 Ring Bologna
1 Jar German Pickles
1 Thomy Mayonnaise 500ml
Salt and Pepper to taste.

Slice Ring Bologna in 1/4" slices. Cut these slices in fine cubes or strips, dice the pickles as well. 
Add Mayonnaise and mix well. Season with salt and pepper. Serves 10-12 people.

Source: germandeli.com