Both the Big Indian and the Mark 11 are the same case, movement, dial, but the markings are different. The Mark 11 I believe was for the RAF Vulcan bomber like it was used in the James Bond movie. It is the large delta wing nuclear bomber. Not to be confu...
Both the Big Indian and Mark 11 are 44mm and absolutely identical. Here is a Mark 11 6B/346 from my friend. 44mm next to 47mm Weems. Next to 36mm 6B/159. You see it is clearly marked 6B/346 The Big Indian is marked with only an broad arrow and number. It ...
Yes the "Greenlander" was WW2 British Army and kind of looks a lot like the Mark11 and Big Indian. The size you mentioned is definitely WWW Longines. The Big Indian, I don't think there is any information about if it was used for flight or ground duty (at...