| Reference Number | TPC/2/3/20 |
| Title | National: Stage Wagon Installation 904/SP3 A&B |
| Level | Item |
| Date | c 1960-c 1970 |
| Description | Page 8, on interlocks, from the specification. Original folder disposed of. 'National: Stage Wagon Installation 904/SP3 A&B' was written on the side. |
| Extent | 1 sheet |
| Series | Standardised Paperwork - Letters, Contracts, Schedules and Specfications |