Seeing the interest in the Betty bomber thread,here is some
other stuff you may find interesting,
1/ 97 model telegraph practice no2 model 437 made 5/1940.navy
2/ compass type2 mk2 navigators compass made 3/1942.army
3/ compass model 1 mk1 made 5/1939.army
4/ turn and bank ..believed type 2.navy
5/ amp or volt gauge...someones back pocket!