Wallis & Steevens steam engines in preservation

Add all individual articles on steam engines built by Wallis & Steevens that survive in preservation (includes steam rollers & portables).

Note:Other types of machinery built by Wallis & Steevens belong in;

• Category:Wallis & Steevens machinery in preservation
• Category:Wallis & Steevens road rollers in preservation - for internal combustion engined rollers