Kovea Butane fueled pre-heater torch for classic type stoves that has few differences compared to this one: https://classiccampstoves.com/threads/kovea-pre-heating-torch.39534/ Control knob is made of aluminum: Instead of 'model number and item name' there is a brand name 'Kovea' embossed on side of 'the hook': Under side of 'the hook' pricker mounting strip is a bit wider: I contacted to Kovea to ask some information and manufacturing dates for it. They were only able to tell that those were made on 80's. Here are pictures of another Kovea and Royal pre-heater torches: https://classiccampstoves.com/threads/s-korean-kovea-and-royal-quick-lighters.30569/
