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| Title | Aero engines | 
|---|---|
| Creator | D Napier & Sons | 
| Date of Creation | c1949/1954 | 
| Description | Engine under development at the Park Royal Development Test Houses. Stamped on rear - D Napier & Son Ltd, Publicity Department, Photographic Ref. No. 553P. | 
| Archive Reference | NAP/4/3/8/2/10 | 
| Media | Photographic print | 
| Dimensions | N/A |