Slicer Thingy

Here's another gadget my elderly Uncle Fred had sent to me back in the mid-80's.  The original picture on the packaging showed them to be a sort of  'tomato saw' with which you could end up with a bunch of uniformly sliced (sawed) tomatoes. 

Below:  One side of its blades has little 'saw teeth'...

While I do have a regular egg slicer, I find myself grabbing this little 'saw', first, when making egg salad sandwiches-- and then doing the chopping with the metal kind of meat chopper which I pictured in a different posting under GADGETS.