On eBay item number 120424843113 and Auctiva Commerce item No 120424843113 you can purchase a unique British Second World War Compass, restored to restoration standard. MK111 Prismatic Compass The compass is re-built from the original MK111. To restore we strip down the whole unit and start the build from scratch but up grade the night lights which were originally promethium, we now use tritium. The brass case is cleaned, polished, lacquered and the hinge if necessary is replaced. Gaskets on the compass bowl are replaced, mother of pearl card is carefully cleaned and sapphire jewel checked for serviceability, all night lights replaced. Unit is then calibrated and temperature tested, accuracy is to +/- 40 mins of arc, re-filled with isopropyl and temperature tested to -32 degrees centigrade to plus 52 degrees centigrade. When completed we have a superb working instrument which can also be added to a collection of scientific instruments. With the compass is supplied a CD which contains the information for understanding and using the prismatic compass plus a large quantity of early 20th century scientific catalogues. Since January 2009 I have moved my stock to the following pub where my stock can be viewed virtually 24/7. It is the Rising Sun at St Mawes in the Roseland Peninsula, Cornwall. Also at Tregony Antiques, close to St Mawes but please phone first 01872530225 or visit Ebay and Auctiva Commerce My ID is gizmo23230 here you can view and buy on line. The date on the compass will vary from 1939-1945. Please allow 28 days for delivery. If in addition you would like to include a leather case, please add £22 to your order.