The partners – Louis James Emil Jonas (1885-1962) and Ernest Carnall (1886-1984) – started business in about 1923. Jonas was a Birmingham-born ironmonger’s assistant; Carnall was a Sheffield cutler. The firm was a cutlery and electro-plate manufacturer and merchant at 96 Carver Street. It ceased trading in about 1934, when it was in Arley Street. The mark on knives was ‘JONCAR’.