This is a typical shape of the european refrigerator lamps
It have an E14 base, much larger then the bases of the american appliance lamps.
This lamp is unbranded.
Actually it's smaller than what we use in our refrigerators. We use E-26 based lamps in them. Some use one E-12 based lamp as a nightlight of the water/ice dispenser.
I've seen a few old refrigerators with their original S14 10W, E26 lamps! I've actually got one of those two or three years ago, it burned out on me unfortunately.
Usually 40w for the E-26s. 10w for the E-12s.