Given how long I've been collecting records, I've own astonishingly few turntables.
The first one I can remember using was a portable suitcase-type Silvertone model from Sears which looked a lot like this, except that mine was green and covered cheap leatherette.
Notice the speed lever on the left-hand side. These units spun records at 45 and 33 1/3 but could also play older 78s and the obscure 16 2/3 RPM singles. The plastic tone arm featured a dual-sided cartridge. One side featured a stylus fine enough to get into the microgrooves of LPs and 45s. If you wanted to play 78s, you need to switch to the bigger needle on the other. If you tried to use the 78 needle on LPs, it wouldn't fit into the grooves and just skate helplessly over the surface of the record.