A pilot of a Schweizerische Flugwaffe’s Messerschmitt Bf 109 ready for the flight inside the cockpit of his aircraft. The flight suite, oxygen mask included, is well different from that in use in the German Air Force. Victor Sierra

Swiss pilot

Winter photo of a Messerschmitt Bf 109E-3a (“a” for Ausland/Export) of the FliegerKompanie 21 (Fl.Kp. 21), Schweizer Flieger-und Fliegerabwehrtruppen (Swiss Air and Anti-aircraft Troops), dressed with a flashy shark mouth under the nose. Partially visible over the engine cowling the unit’s emblem and over the propeller’s blades the logo of VD, the German builder of the propeller. The Swiss employed 88 Bf 109E-3, 80 delivered directly by the Germany and 8 built in Switzerland, plus some Bf 109G. Victor Sierra

Shark mouth in the Alps

Ceremonial oath of Bulgaria , end of the 1930s or early 1940s

@Carn