a manual meat slicer My household really likes things like turkey and ham sandwiches for lunch. 

One thing I've searched around for is a 'manual' meat slicer. I'm thinking of something like a miter box like one might find for woodworking. Basically it would be a device that holds a serrated knife in a frame, and allows the meat to slide along in increments in order to achieve consistent slices. Does anyone know if there is something similar for slicing meat? (I know that electric meat slicers are available; but do I need yet another electric appliance?)

Personally, I don't have any problems with just using a knife. But others in the household lack slicing proficiency. 

Addendum
For those who have suggested that I get knives...I have great knives and have no problems in using them; and like I said above, it's for others in the household who are not proficient. 

Anyway, it looks like there is nothing like what I visualized even on google searches. I added a picture of a woodworking miterbox in case people don't know what that is. Of course a knife would replace the saw and you probably wouldn't have the angle cuts; and it would be tailored so that you could slide the food item along incrementally for even slices.
I know it's for vegetables but you should be able to trim the meat into a size that you can slice with a mandolin.   I haven't tried it myself but if you get on that has no blade guard it should work great.