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| Title | Railway engines; marine engines | 
|---|---|
| Creator | D Napier & Sons | 
| Date of Creation | 1950 | 
| Description | Deltic engine at Acton test house. Stamped on rear - D Napier & Son Ltd, Publicity Department, Photographic Ref. No. 2755H, and Secret. | 
| Archive Reference | NAP/4/3/10/19/2 | 
| Media | Photographic print | 
| Dimensions | N/A |