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About Mainmast






Historic Firearms and Artillery; Mounts, Carriages, barrels, firing mechanisms, historic woodwork, Optical equipment and fittings, ventilators, gun racks, gun tools and furniture.
Fixtures and fittings of Historic Buildings; Railings and gates, brackets, fixings and beams.
Large and Working Machines

We are an engineering company that specialise in the maintenance repair and conservation of cannons, historic artillery and historic metalwork, we can carry out a variety of tasks ranging from a basic clean and re-paint to complete conservation of un restored pieces including barrel and carriage repairs and manufacture of replica carriages both timber and iron.

In addition we now manufacture replica inert and blank firing cannons for sale or hire and supply antique and replica artillery, firearms and armour (See Sales Page)

Working with John Perkins, an armourer of 30 years experience we can supply high quality hand made armour, from a helmet to a full suit, all made to order and individual requirements.

We are contractors to:

  • English Heritage

  • The National Trust

  • Registered contractors to the MOD



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HMS Victory

Manufacture, deliver and install two 24pdr and one 12pdr "Muller" pattern naval carriages to HMS Victory, the oldest commissioned warship in the world. 


Items for Sale

Flintlock Cannon lock

Quality replica cannon lock of the Henry Knock design, as originally made by "Sherwood". These locks were used on cannon in land based forts and carried by famous ship such as HMS Victory and HMS Colussus, originals recovered from the wreck of HMS Colussus, can be seen in the Isles of Scilly museum, St Marys, Isles of Scilly.
Go to sales page...



Mainmast Conservation
trading name of Landberry Engineers Ltd

Little Trethvas
The Lizard
Cornwall TR12 7AT

Telephone: 01326 290904
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Company Number 7144290

Sales & Enquires Please ask for Ian Henn

Terms of Business

Non Account Customers:
Payment on completion of work

Account Customers
Payment to be made within 30 Days from date of invoice



We are a member of the Institute of Conservation and all work carried out conforming to their ethics and standards