.450 Adams MkI MkII MkIII cartridges shapes comparison<br>Mk I, introduced in 1868 has a separate iron base disk;<br>Mk II, introduced 1877 has a separate brass base disk;<br>Mk III, introduced in 1909 has a solid drawn case
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<ul><li> <a href="//commons.wikimedia.org/wiki/File:450_Adams_MkI_dimensions.gif" title="File:450 Adams MkI dimensions.gif">450 Adams MkI dimensions.gif</a>: <a href="//commons.wikimedia.org/wiki/File:450_Adams_MkI_dimensions.gif" class="image"><img alt="450 Adams MkI dimensions.gif" src="https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/450_Adams_MkI_dimensions.gif/200px-450_Adams_MkI_dimensions.gif" decoding="async" width="200" height="207" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/450_Adams_MkI_dimensions.gif/300px-450_Adams_MkI_dimensions.gif 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/450_Adams_MkI_dimensions.gif/400px-450_Adams_MkI_dimensions.gif 2x" data-file-width="454" data-file-height="470"></a></li>
<li><a href="//commons.wikimedia.org/wiki/File:450_Adams_Mk_II_dimensions.png" title="File:450 Adams Mk II dimensions.png">450 Adams Mk II dimensions.png</a>: <a href="//commons.wikimedia.org/wiki/File:450_Adams_Mk_II_dimensions.png" class="image"><img alt="450 Adams Mk II dimensions.png" src="https://upload.wikimedia.org/wikipedia/commons/thumb/b/bb/450_Adams_Mk_II_dimensions.png/200px-450_Adams_Mk_II_dimensions.png" decoding="async" width="200" height="245" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/b/bb/450_Adams_Mk_II_dimensions.png/300px-450_Adams_Mk_II_dimensions.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/b/bb/450_Adams_Mk_II_dimensions.png/400px-450_Adams_Mk_II_dimensions.png 2x" data-file-width="490" data-file-height="600"></a></li>
<li><a href="//commons.wikimedia.org/wiki/File:450_Adams_MkIII_dimensions.gif" title="File:450 Adams MkIII dimensions.gif">450 Adams MkIII dimensions.gif</a>: <a href="//commons.wikimedia.org/wiki/File:450_Adams_MkIII_dimensions.gif" class="image"><img alt="450 Adams MkIII dimensions.gif" src="https://upload.wikimedia.org/wikipedia/commons/thumb/3/33/450_Adams_MkIII_dimensions.gif/200px-450_Adams_MkIII_dimensions.gif" decoding="async" width="200" height="208" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/3/33/450_Adams_MkIII_dimensions.gif/300px-450_Adams_MkIII_dimensions.gif 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/3/33/450_Adams_MkIII_dimensions.gif/400px-450_Adams_MkIII_dimensions.gif 2x" data-file-width="452" data-file-height="470"></a><br><b>and based on a picture that can be <a rel="nofollow" class="external text" href="https://cartridgecollectors.org/?page=introduction-to-455-cartridges">found here</a></b>.</li></ul>