Noticed while familiarising myself with THIS Hipolito lantern, a scorch mark on the glass. Lucky it didn’t break. I examined the Preston loop in the vicinity of the scorch mark, cleaned it with emery cloth and detected a pinhole. Silbraze skim over the area, problem solved.
@presscall Nice work. I've made a similar repair on two vapourisers, sadly, nowhere near as neat as yours.