Three different types of needle plate sets - New Old Stock.  These are not marked with any brand names but fit several different Japanese-made models of badged, Class 15 machines and some Singers. For size, please refer to pictures on the blue, gridded background, keeping in mind that the lines are 1/2".

The Front-load bobbin sets are larger, but not as big as the Morse Fotomatics.  

The side-load straight stitch plates fit only my vintage, straight-stitch only machines, including Brother, American Home, etc.  Note that the feed-dog pattern is different than most machines that have zig-zag capability.

The side-load zigzag plates fit almost every machine I have made between 1940 and 1970. Visetti, White, Kenmore, Brother, Vornado, "Deluxe" variants, etc.  Zig-Zag badged machines from Japan mostly used the same footprint for these plate sets.