| 6539 | J Attwood | Catalogue B9 | 1932-1933 | WCP |
| 6540 | Hattersley Ltd | Hattersley valves | 1957 | WCP |
| 6541 | Binns & Speight Ltd | 'Beaness' boilers calorifiers cylinders | 1949 | WCP |
| 6542 | Hartley & Sugden Ltd | Boilers & heating appliances | 1923 | WCP |
| 6543 | Beeston Boiler Co Ltd | Robin Hood domestic boilers, radiators, valves, pipes | 1924 | WCP |
| 6544 | Beeston Boiler Co Ltd | Robin Hood domestic boilers, radiators, valves, pipes | 1914 | WCP |
| 6545 | Beeston Boiler Co Ltd | Robin Hood domestic boilers, radiators, valves, pipes | 1921 | WCP |
| 6546 | Beeston Boiler Co Ltd | Robin Hood domestic boilers, radiators, valves, pipes | 1929 | WCP |
| 6547 | Lumbys Ltd | Lumbys boilers & radiators | 1922 | WCP |
| 6548 | Lumbys Ltd | "Solar" boilers & radiators | 1937 | WCP |
| 6549 | Lumbys Ltd | Lumbys boilers & radiators | 1948 | WCP |
| 6550 | Lumbys Ltd | Lumbys boilers | 1956 | WCP |
| 6551 | Lumbys Ltd | Lumbys boilers | 1956 | WCP |
| 6552 | Ideal Boilers & Radiators Ltd | Boilers, radiators & accessories | 1919 | WCP |
| 6553 | Beeston Boiler Co Ltd | Robin Hood domestic boilers, radiators, valves, pipes | 1938 | WCP |
| 6554 | Dunlop & Ranken Ltd | Iron & steel catalogue | 1932 | WCP |
| 6555 | Beeston Boiler Co Ltd | Robin Hood : sectional & domestic boilers, radiators, valves, pipes | 1952 | WCP |
| 6556 | British Steam Specialites Ltd | C35R catalogue | 1949 | WCP |
| 6557 | Godwin Ltd | Pumping machinery & accessories | 1939 | WCP |
| 6558 | edited by S G B Stubbs | The encyclopedia of sanitary engineering, heating & plumbing V1 | | WCP |
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