Vertical slots - French? Diameter 5cm, max height at top of done 2cm. Possibibly for 100 type stove or similar. Two cut-outs in base sleeve for securing in position: Anyone out there seen the like before? @Nicola Francesco Elia
@igh371 Lilor’s range of lpg stoves used that pattern … … but as you can see, they were identifiable (inscription) as Lilor products. 1950’s. Versatile designs, those Lilors.
Could easily have been been pattern parts available too though. Appear to be identical in all other respects ...