A laminated mahogany propeller boss, stamped 'LP.710.6 HP CLERGET --M 875 5991 D2740 P2120' (indistinct in places), the timepiece with roman and arabic numerals surrounded by eight bolt heads, the aluminium rear cover with opening door engraved with RFC wings and lettered 'R.F.C. 54 Sqd Nov 1916', on mahogany mount -- 11¼in. (28.5cm.) high. Key; and a Jeppesen CSG-9 computor with instructions (2)