Two metallic packing Rings and springs for pistons
c.1878
Brass corrugated Jointing Ring covered with graphited asbestos
Dexine packing ring
Red Parkesine curtain ring
1862
Two Hopkinson original 22-25% nickel-steel rings, 1888-1889
1888-1889
Medicine man's ring made of lanceolate nut on iron ring
1880-1920
Brass cylindrical ring
1812-1900
Mourning ring, in memory of James Watt
Spare ring for Haddon's internal tube cutter
Dexine hydraulic ram ring
Ivory coloured Parkesine curtain ring.
1862
Black Parkesine curtain ring
1862
Mottled green Parkesine ring
1862
Ring, Quare
1850
Gold(?) ring, with inside banded in zinc and coppe
1871-1920
Brass corugated Asbestos-corded Jointing Ring
Green Parkesine ring
1862
Ivory coloured Parkesine curtain ring
1862
Marbled green Parkesine curtain ring
1862
Leakproof rubber ring
'Rocket' silver ring
Light blue Parkesine ring
1862
Black Parkesine ring
1862
Ivory coloured Parkesine curtain ring
1862
Ivory coloured Parkesine curtain ring
1862
Rust red coloured Parkesine curtain ring
1862