A Harden Star glass fire grenade A Harden Star glass fire grenade, late 19th to early 20th century, liquid-filled, in cobalt blue, of reeded spherical form, with embossed manufacturers stamp, and original seal, reg. no. 10490, 17cm high together with another plain example, liquid-filled, with a red wax-sealed top, 10cm high and a group of three fire marks, comprising Nottinghamshire and Derbyshire example, 25.5cm high, a Royal Exchange example, numbered 754398, 19cm high, and a London Assurance example, 30cm high (5) Condition Report: Fire grenades) Surface marks throughout commensurate with the age and nature of the items. Fire marks) Marks and wear throughout. Losses to the paint.