Smeg domino gas hob (Winnersh RG41)

This is a used Smeg PGF32G gas hob from their domino range. We’ve had it about 12 years and it worked just fine but we replaced it with an induction hob last week. The replacement was so that we could get rid of our use of natural gas and just go electric/renewable. The round thing is a removable wok ring, so that round-bottomed pans can be used with the hob.