Hello, I know there are some Lemania fans here, so thought this might be of interest, Lemania Royal Navy 2 button Chronograph issued in 1975, this version was only issued in '75 and '76, so pretty rare. Powered by Lemania Calibre 1872. There are many other issued Lemania chronographs issued to other armed forces, but this is distinct in it's case is assymetrical. Hence commonly referred to as an assymetrical chronograph. I believe there is only this version in 2 button configuration form, from Lemania, other assymetrical cased issued chronograph exist made by CWC, Hamilton, Precista and Newmark. More common is the single button chronograph, again issued to British and other armed forces. Here are a couple of single button chronographs issued to Air Ministry and Royal Navy.