Collection: Crompton Parkinson Ammunition Collection – CP Headstamp, Guiseley, Yorkshire, UK

This collection features ammunition produced by CP – Crompton Parkinson Ltd, based in Guiseley, Yorkshire, UK, a notable British manufacturer involved in munitions production during the mid-20th century. Crompton Parkinson supplied small-arms cartridges, including .303 British and other service calibres, for both military and civilian markets. Cartridges bearing the CP headstamp reflect the company’s precise manufacturing standards and characteristic British ordnance features of the period. The collection highlights variations in production dates, load types, and case materials, offering collectors and historians valuable insight into British ammunition manufacturing outside the major Royal Ordnance factories. Ideal for display, study, or reference, CP-marked rounds illustrate the contribution of private industry to Britain’s ordnance supply chain and form a significant and historically interesting component of any serious ammunition or militaria collection.