Gross-ness aside, pulling out the 1970's cabinets exposed the original silhouettes of the first, very shallow, built-in cabinets and the location of the gas stove and its pipe.
All those white stripes on the right corner were supports for the shelves, and also the countertop, covering up virgin plaster. On the left, it seems the gas stove was not moved when the kitchen was last painted and vinyl-ed. So we can see the 1920s cabinets lasted at least until the age of the golden vinyl.
The sink on the right (unseen here) had a high back, judging from the height of the window. The hole for its inlet pipes is still in the ledger board at the base of the inside wall, since they ran up to the sink back from inside the wall.
The sink was bookended by the two built-in cabinets, the left cabinet being the one shown above. Nearly the entire wall above the countertop line was removed and replaced with drywall, two layers in some places, and this is where I assume there used to be the old white subway tile found under the house. When it was removed, it must have taken the whole wall with it. I'm replacing it on a more extensive scale, probably using in-store tile from Home Depot. It's $.23 a tile, and no longer has the wide spacers or rounded edge as it did just a few years ago.