1. BM/OPBM/1 Reference (shelfmark): BM/OPBM/1 Title: Records relating to acquisitions Collection Area: Corporate Archives Languages: English Date Range: 1892-1974 Extent: 43 volumes
2. BM/OPBM/1/1 Reference (shelfmark): BM/OPBM/1/1 Title: Invoices for Acquisitions Collection Area: Corporate Archives Languages: English Date Range: 1892-1974 Extent: 43 volumes
3. BM/OPBM/1/1/1 Reference (shelfmark): BM/OPBM/1/1/1 Title: Volume 1 Collection Area: Corporate Archives Languages: English Date Range: 6 Apr 1892-14 Dec 1896 Extent: 1 volume, Paper
4. BM/OPBM/1/1/2 Reference (shelfmark): BM/OPBM/1/1/2 Title: Volume 2 Collection Area: Corporate Archives Languages: English Date Range: 4 Jan 1897-16 Dec 1901 Extent: 1 volume, Paper
5. BM/OPBM/1/1/3 Reference (shelfmark): BM/OPBM/1/1/3 Title: Volume 3 Collection Area: Corporate Archives Languages: English Date Range: 18 Nov 1901-18 Dec 1908 Extent: 1 volume, Paper
6. BM/OPBM/1/1/4 Reference (shelfmark): BM/OPBM/1/1/4 Title: Volume 4 Collection Area: Corporate Archives Languages: English Date Range: 18 Dec 1908-20 Dec 1922 Extent: 1 volume, Paper
7. BM/OPBM/1/1/5 Reference (shelfmark): BM/OPBM/1/1/5 Title: Volume 5 Collection Area: Corporate Archives Languages: English Date Range: 3 Apr 1923-17 Dec 1935 Extent: 1 volume, Paper
8. BM/OPBM/1/1/6 Reference (shelfmark): BM/OPBM/1/1/6 Title: Volume 6 Collection Area: Corporate Archives Languages: English Date Range: 1 Jan 1936-23 Nov 1939 Extent: 1 volume, Paper
9. BM/OPBM/1/1/7 Reference (shelfmark): BM/OPBM/1/1/7 Title: Volume 7 Collection Area: Corporate Archives Languages: English Date Range: 14 Feb 1940-13 Nov 1951 Extent: 1 volume, Paper
10. BM/OPBM/1/1/8 Reference (shelfmark): BM/OPBM/1/1/8 Title: Volume 8: A - Z Collection Area: Corporate Archives Languages: English Date Range: 1952-1954 Extent: 1 volume, Paper