HMVS Lonsdale is significant as one of only three surviving second-class torpedo boats that were used in the defence of the Australian and New Zealand colonies. HMVS Lonsdale is historically significant as a rare representative of a Victorian second-class torpedo boat. Lonsdale demonstrates technical significance as an early example of the development of the fast attack torpedo craft.Round brass pressure gauge from HMVS Lonsdale with white face and black numbers. range: 0-350 lbs/sq. inchE.Boudon's Pantent Trade Mark: Delta Hannan & Buchcananhmvs, lonsdale, pressure gauge, torpeto boat