From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Quotation comparison table for three different black Bakelite parts from various suppliers.
| Identifier | ExFiles\Box 168a\4\ img013 | |
| Date | 12th June 1937 guessed | |
| PIECE NO. QUANTITY. DE LA{L. A. Archer} RUE. WITTON MOULDED INSULATION WORKS. BIRKBYS. EBONESTOS. R.R. In Black Bakelite Grade X.20 HD.{Mr Hayward/Mr Huddy} D.B.436. 400 19.3d. per 100. 2 1/4d. ea. 1d. ea. Nut. 1000 19.3d. " " 2 1/4d. " 1d. " (No inserts.) Part cost Mould - £20. 0.0d. £20. 0. 0d. £25.0.0d. 6/7 weeks. 7/8 weeks. D.B.440. 400 9.6d. per 100. 3 1/4d. ea. 1 3/4d. ea. Nut. 1000 9.6d. " " 3d. " 1-3/8d. ea. (1 insert.) Part cost Mould - £20. 0.0d. £12. 0. 0d. £17.0.0d. 6/7 weeks. 7/8 weeks. D.B.442. 400 60.0d. per 100. 1.2d. ea. 6d. each. Cover. 1000 60.0d. " " 1.1d. " 5 1/2d. " (1 insert.) Part cost Mould = £28.10.0d. £48. 0. 0d. £36.0.0d. 7/8 weeks. 7/8 weeks. -------------------------- | ||