knife holder for the buffet table

3.5" high x 5" deep x 3.75" wide
Two metal rollers at front, plate at the back is almost vertical but is tilted slightly forward.
Can anyone identify this? I picked it up at a local thrift store.

Identified: the knives are held horizontally, inserted with the blade downward and the points slide into slots in the back plate. The knives ride over the rollers when pulled out.