Since I've been trying to parse out the history of our house, I thought I would show you an apartment building I saw in Oakland that is very original.
Our house was built in '27, but had a major addition in '39, some work in '47 (sink date) to the 50s, and some linoleum added to the kitchen in the '60s.
Houses built during certain time periods remain remarkably consistent with the style of the day. It's only somewhat recently that we have favored old styles over new. For example, an original Craftsman house from '10s-'20s would often have "subway" 3x6" wall tiles and 1" hexagon floor tiles. From the '30s-'50s, Dal-Tile 4&1/4" square tiles would be the most common, all over the place, as in this apartment building.
Above you can see how I determined this is a '40s apartment building. Likely late '40s, as WWII ended in '45 and a lot of apartment buildings were built for the post war population boom. Edit: I checked and it was built 1940
Above the late 40s sink, surrounded by Dal-Tile counter top. Tile was most common countertop until '50s/'60s, when linoleum was used with undermount white cast iron sinks, like the kind currently being pulled out of my kitchen.
Hopefully you can see why I think my master bath was done in '39.
Here's the summary:
-My sink is pre-war Crane Drexel. Major additions were done in '39 so I would guess the sink is from '39 or '40.
-The master bath was originally a changing room. That's why it has a closet and a redwood vanity desk. That is a very old fashioned feature more in line with the Victorian era of body shame
-the shower is white square tiles (fits with '39). The trim is like the kind in the '50s bath above, probably popular from the '30s-'50s as it has a hint of Deco style.
-the floor has no hint of tile, just linoleum, which means the floor was originally redwood (probably) like the rest of the house, then at some point, probably in the '60s they added linoleum and mosaic tile in the shower pan.
-the mosaic tile in the shower pan is super '60s. No doubt about it. Blue and green, under 1" squares and rectangles in "random" pattern.