They clearly show wear. 
I am not sure if they were replaced from another older device, or the entire cover is from L390, but that one would have a plastic cover for where this one has a stylus. It doesn’t seem like anything was snapped out of there.
I couldn’t find replacement ones online, and I am not sure if contacting the shop is a good idea. See, the L390 Yoga has a touchscreen with better colors and seems to be a bit more expensive (but not much).
However, I bought this as “L390”. I noticed the description said “Touchscreen: yes”, which I realized meant they likely mistook the Yoga version for the base version. Indeed, that is the case.
Currently they have one L390 Yoga in similar condition and same configuration, but the screen has some white spots (this one is flawless), …and it’s €46 more expensive.
If you’re curious, i5 8365U, 16GB RAM (single-channel), used 256GB Samsung SSD (I don’t remember if SATA or NVME), €180 and 2 year warranty.
Also, if you’re wondering what that port with network symbol is, it appears to be a proprietary connector used on ThinkPads requiring an “Ethernet Extension” adapter to be usable.
Hmmm, did you get it new?
I’ve checked a review of this laptop and it had correct ones:
Yes I bought it ~3 years ago directly from Lenovo and the rubber feet look just like the ones in that photo.
It looks like the feet are on the opposite side of the hinge in this photo and on the same side as them in your photo?
There are feet both on the side next to the hinge and on the side opposite the hinge in the photo. Like, one one each corner of the underside of the laptop.